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It resolves the session, calls ",[457,627,462],{},", captures timing into ",[457,630,631],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[634,635,274],"h2",{"id":636},"options",[454,638,639,640,647],{},"Inherits all ",[641,642,644,646],"a",{"href":643},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[457,645,462],{}," options",", plus:",[649,650,651,670],"table",{},[652,653,654],"thead",{},[655,656,657,661,664,667],"tr",{},[658,659,660],"th",{},"Option",[658,662,663],{},"Type",[658,665,666],{},"Default",[658,668,669],{},"Description",[671,672,673,694,713,732],"tbody",{},[655,674,675,681,686,691],{},[676,677,678],"td",{},[457,679,680],{},"exclude",[676,682,683],{},[457,684,685],{},"string[]",[676,687,688],{},[457,689,690],{},"['\u002Fapi\u002Fauth\u002F**']",[676,692,693],{},"Route patterns to skip (glob).",[655,695,696,701,705,710],{},[676,697,698],{},[457,699,700],{},"include",[676,702,703],{},[457,704,685],{},[676,706,707],{},[457,708,709],{},"undefined",[676,711,712],{},"If set, only matching routes are resolved.",[655,714,715,720,725,729],{},[676,716,717],{},[457,718,719],{},"onIdentify",[676,721,722],{},[457,723,724],{},"(log, session) => void",[676,726,727],{},[457,728,709],{},[676,730,731],{},"Called after successful identification.",[655,733,734,739,744,748],{},[676,735,736],{},[457,737,738],{},"onAnonymous",[676,740,741],{},[457,742,743],{},"(log) => void",[676,745,746],{},[457,747,709],{},[676,749,750],{},"Called when no session is found.",[634,752,754],{"id":753},"route-filtering","Route Filtering",[454,756,757],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[465,759,761],{"className":467,"code":760,"language":470,"meta":471,"style":471},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[457,762,763,779,788,803,816,830,837],{"__ignoreMap":471},[475,764,765,767,769,771,773,775,777],{"class":477,"line":478},[475,766,520],{"class":519},[475,768,523],{"class":489},[475,770,526],{"class":485},[475,772,490],{"class":529},[475,774,532],{"class":489},[475,776,535],{"class":485},[475,778,538],{"class":485},[475,780,781,783,785],{"class":477,"line":509},[475,782,545],{"class":544},[475,784,548],{"class":485},[475,786,787],{"class":489}," [\n",[475,789,790,793,795,797,799],{"class":477,"line":516},[475,791,792],{"class":485},"    '",[475,794,557],{"class":502},[475,796,554],{"class":485},[475,798,535],{"class":485},[475,800,802],{"class":801},"sHwdD","     \u002F\u002F Better Auth itself\n",[475,804,805,807,809,811,813],{"class":477,"line":541},[475,806,792],{"class":485},[475,808,566],{"class":502},[475,810,554],{"class":485},[475,812,535],{"class":485},[475,814,815],{"class":801},"   \u002F\u002F Public endpoints\n",[475,817,818,820,823,825,827],{"class":477,"line":577},[475,819,792],{"class":485},[475,821,822],{"class":502},"\u002Fapi\u002Fhealth",[475,824,554],{"class":485},[475,826,535],{"class":485},[475,828,829],{"class":801},"      \u002F\u002F Health checks\n",[475,831,832,835],{"class":477,"line":598},[475,833,834],{"class":489},"  ]",[475,836,574],{"class":485},[475,838,839,841],{"class":477,"line":612},[475,840,615],{"class":485},[475,842,618],{"class":489},[454,844,845],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[465,847,849],{"className":467,"code":848,"language":470,"meta":471,"style":471},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[457,850,851,867,895],{"__ignoreMap":471},[475,852,853,855,857,859,861,863,865],{"class":477,"line":478},[475,854,520],{"class":519},[475,856,523],{"class":489},[475,858,526],{"class":485},[475,860,490],{"class":529},[475,862,532],{"class":489},[475,864,535],{"class":485},[475,866,538],{"class":485},[475,868,869,871,873,875,877,880,882,884,886,889,891,893],{"class":477,"line":509},[475,870,580],{"class":544},[475,872,548],{"class":485},[475,874,551],{"class":489},[475,876,554],{"class":485},[475,878,879],{"class":502},"\u002Fapi\u002Fdashboard\u002F**",[475,881,554],{"class":485},[475,883,535],{"class":485},[475,885,499],{"class":485},[475,887,888],{"class":502},"\u002Fapi\u002Faccount\u002F**",[475,890,554],{"class":485},[475,892,571],{"class":489},[475,894,574],{"class":485},[475,896,897,899],{"class":477,"line":516},[475,898,615],{"class":485},[475,900,618],{"class":489},[454,902,903,905,906,908,909,912,913,916,917,919,920,922],{},[457,904,700],{}," and ",[457,907,680],{}," use glob patterns (",[457,910,911],{},"*",", ",[457,914,915],{},"**","). Provide both if you need granular control — ",[457,918,680],{}," wins over ",[457,921,700],{},".",[634,924,926],{"id":925},"lifecycle-hooks","Lifecycle Hooks",[454,928,929,930,932],{},"Use ",[457,931,719],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[465,934,936],{"className":467,"code":935,"filename":469,"language":470,"meta":471,"style":471},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[457,937,938,954,981,1017,1044,1049,1054,1071,1096,1101],{"__ignoreMap":471},[475,939,940,942,944,946,948,950,952],{"class":477,"line":478},[475,941,520],{"class":519},[475,943,523],{"class":489},[475,945,526],{"class":485},[475,947,490],{"class":529},[475,949,532],{"class":489},[475,951,535],{"class":485},[475,953,538],{"class":485},[475,955,956,959,961,964,968,970,973,976,979],{"class":477,"line":509},[475,957,958],{"class":529},"  onIdentify",[475,960,548],{"class":485},[475,962,963],{"class":485}," (",[475,965,967],{"class":966},"sHdIc","log",[475,969,535],{"class":485},[475,971,972],{"class":966}," session",[475,974,975],{"class":485},")",[475,977,978],{"class":519}," =>",[475,980,538],{"class":485},[475,982,983,986,988,991,993,996,998,1001,1004,1006,1009,1011,1014],{"class":477,"line":516},[475,984,985],{"class":481},"    if",[475,987,963],{"class":544},[475,989,990],{"class":489},"session",[475,992,922],{"class":485},[475,994,995],{"class":489},"user",[475,997,922],{"class":485},[475,999,1000],{"class":489},"plan",[475,1002,1003],{"class":485}," ===",[475,1005,499],{"class":485},[475,1007,1008],{"class":502},"enterprise",[475,1010,554],{"class":485},[475,1012,1013],{"class":544},") ",[475,1015,1016],{"class":485},"{\n",[475,1018,1019,1022,1024,1027,1030,1033,1036,1038,1040,1042],{"class":477,"line":541},[475,1020,1021],{"class":489},"      log",[475,1023,922],{"class":485},[475,1025,1026],{"class":529},"set",[475,1028,1029],{"class":544},"(",[475,1031,1032],{"class":485},"{",[475,1034,1035],{"class":544}," _forceKeep",[475,1037,548],{"class":485},[475,1039,607],{"class":606},[475,1041,493],{"class":485},[475,1043,618],{"class":544},[475,1045,1046],{"class":477,"line":577},[475,1047,1048],{"class":485},"    }\n",[475,1050,1051],{"class":477,"line":598},[475,1052,1053],{"class":485},"  },\n",[475,1055,1056,1059,1061,1063,1065,1067,1069],{"class":477,"line":612},[475,1057,1058],{"class":529},"  onAnonymous",[475,1060,548],{"class":485},[475,1062,963],{"class":485},[475,1064,967],{"class":966},[475,1066,975],{"class":485},[475,1068,978],{"class":519},[475,1070,538],{"class":485},[475,1072,1074,1077,1079,1081,1083,1085,1088,1090,1092,1094],{"class":477,"line":1073},8,[475,1075,1076],{"class":489},"    log",[475,1078,922],{"class":485},[475,1080,1026],{"class":529},[475,1082,1029],{"class":544},[475,1084,1032],{"class":485},[475,1086,1087],{"class":544}," anonymous",[475,1089,548],{"class":485},[475,1091,607],{"class":606},[475,1093,493],{"class":485},[475,1095,618],{"class":544},[475,1097,1099],{"class":477,"line":1098},9,[475,1100,1053],{"class":485},[475,1102,1104,1106],{"class":477,"line":1103},10,[475,1105,615],{"class":485},[475,1107,618],{"class":489},[454,1109,1110,1111,1113,1114,1116,1117,1119],{},"Hooks fire after the session is resolved and ",[457,1112,462],{}," has set its fields. They run on every request that passes the ",[457,1115,700],{},"\u002F",[457,1118,680],{}," filter, so keep them fast and side-effect-free.",[1121,1122,1123,1128],"tip",{},[454,1124,1125,1126,548],{},"Common patterns for ",[457,1127,719],{},[1129,1130,1131,1135,1138],"ul",{},[1132,1133,1134],"li",{},"Force-keep audit logs for admins or high-value plans.",[1132,1136,1137],{},"Tag the request with feature flags or tenant info loaded from the session.",[1132,1139,1140],{},"Increment a per-user counter for billing.",[634,1142,1144],{"id":1143},"error-handling","Error Handling",[454,1146,1147,1148,1151,1152,905,1154,1157],{},"The middleware catches every error from ",[457,1149,1150],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[457,1153,631],{},[457,1155,1156],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1159,1160,1161],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":471,"searchDepth":509,"depth":509,"links":1163},[1164,1165,1166,1167],{"id":636,"depth":509,"text":274},{"id":753,"depth":509,"text":754},{"id":925,"depth":509,"text":926},{"id":1143,"depth":509,"text":1144},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1171,1174],{"label":298,"icon":301,"to":299,"color":1172,"variant":1173},"neutral","subtle",{"label":312,"icon":315,"to":313,"color":1172,"variant":1173},{},{"title":303,"icon":306},{"title":449,"description":1168},"Ft-jGRp0Xs3NjYmYAXhrK-z4jsNG1S1GJbOMZWpMh0E",[1180,1182],{"title":298,"path":299,"stem":300,"description":1181,"icon":301,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":308,"path":309,"stem":310,"description":1183,"icon":258,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1782924663872]