fix: UserModel::assignIdentities() always produces a DB query · codeigniter4/shield@8e854c8

Took 1.41s from 0.50s limit to run Tests\\Controllers\\RegisterTest::testRegisteredAndSessionExpiredAndLogin

Took 1.29s from 0.50s limit to run Tests\\Controllers\\RegisterTest::testRegisterRedirectsToActionIfDefined

Took 1.29s from 0.50s limit to run Tests\\Controllers\\RegisterTest::testRegisteredButNotActivatedAndLogin

Took 1.26s from 0.50s limit to run Tests\\Controllers\\RegisterTest::testRegisteredButNotActivatedAndRegisterAgain

Took 1.26s from 0.50s limit to run Tests\\Controllers\\RegisterTest::testRegisterActionSuccess

Took 1.24s from 0.50s limit to run Tests\\Unit\\UserIdentityModelTest::testForceMultiplePasswordReset

Took 1.09s from 0.50s limit to run Tests\\Controllers\\RegisterTest::testRegisterActionWithBadEmailValue

Took 0.93s from 0.50s limit to run Tests\\Unit\\PasswordsTest::testHash

Took 0.91s from 0.50s limit to run Tests\\Unit\\DictionaryValidatorTest::testCheckTrueOnNotFound

Took 0.54s from 0.50s limit to run Tests\\Controllers\\LoginTest::testLoginTooLongPasswordArgon2id

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