diff --git a/src/Administration.php b/src/Administration.php
index 85f25a7..9247b30 100644
--- a/src/Administration.php
+++ b/src/Administration.php
@@ -12,8 +12,6 @@ use Delight\Db\PdoDatabase;
 use Delight\Db\PdoDsn;
 use Delight\Db\Throwable\Error;
 
-require_once __DIR__ . '/Exceptions.php';
-
 /** Component that can be used for administrative tasks by privileged and authorized users */
 final class Administration extends UserManager {
 
diff --git a/src/AmbiguousUsernameException.php b/src/AmbiguousUsernameException.php
new file mode 100644
index 0000000..f42dc97
--- /dev/null
+++ b/src/AmbiguousUsernameException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class AmbiguousUsernameException extends AuthException {}
diff --git a/src/AttemptCancelledException.php b/src/AttemptCancelledException.php
new file mode 100644
index 0000000..b922a62
--- /dev/null
+++ b/src/AttemptCancelledException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class AttemptCancelledException extends AuthException {}
diff --git a/src/Auth.php b/src/Auth.php
index 2ac8321..cd10953 100644
--- a/src/Auth.php
+++ b/src/Auth.php
@@ -16,8 +16,6 @@ use Delight\Db\PdoDsn;
 use Delight\Db\Throwable\Error;
 use Delight\Db\Throwable\IntegrityConstraintViolationException;
 
-require_once __DIR__ . '/Exceptions.php';
-
 /** Component that provides all features and utilities for secure authentication of individual users */
 final class Auth extends UserManager {
 
diff --git a/src/AuthError.php b/src/AuthError.php
new file mode 100644
index 0000000..fcae00c
--- /dev/null
+++ b/src/AuthError.php
@@ -0,0 +1,12 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+/** Base class for all (unchecked) errors */
+class AuthError extends \Exception {}
diff --git a/src/AuthException.php b/src/AuthException.php
new file mode 100644
index 0000000..007f9e7
--- /dev/null
+++ b/src/AuthException.php
@@ -0,0 +1,12 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+/** Base class for all (checked) exceptions */
+class AuthException extends \Exception {}
diff --git a/src/ConfirmationRequestNotFound.php b/src/ConfirmationRequestNotFound.php
new file mode 100644
index 0000000..533a853
--- /dev/null
+++ b/src/ConfirmationRequestNotFound.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class ConfirmationRequestNotFound extends AuthException {}
diff --git a/src/DatabaseError.php b/src/DatabaseError.php
new file mode 100644
index 0000000..8245bbe
--- /dev/null
+++ b/src/DatabaseError.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class DatabaseError extends AuthError {}
diff --git a/src/DuplicateUsernameException.php b/src/DuplicateUsernameException.php
new file mode 100644
index 0000000..3836f6c
--- /dev/null
+++ b/src/DuplicateUsernameException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class DuplicateUsernameException extends AuthException {}
diff --git a/src/EmailNotVerifiedException.php b/src/EmailNotVerifiedException.php
new file mode 100644
index 0000000..9f87058
--- /dev/null
+++ b/src/EmailNotVerifiedException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class EmailNotVerifiedException extends AuthException {}
diff --git a/src/EmailOrUsernameRequiredError.php b/src/EmailOrUsernameRequiredError.php
new file mode 100644
index 0000000..7c12028
--- /dev/null
+++ b/src/EmailOrUsernameRequiredError.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class EmailOrUsernameRequiredError extends AuthError {}
diff --git a/src/Exceptions.php b/src/Exceptions.php
deleted file mode 100644
index 021e720..0000000
--- a/src/Exceptions.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-
-/*
- * PHP-Auth (https://github.com/delight-im/PHP-Auth)
- * Copyright (c) delight.im (https://www.delight.im/)
- * Licensed under the MIT License (https://opensource.org/licenses/MIT)
- */
-
-namespace Delight\Auth;
-
-class AuthException extends \Exception {}
-
-class UnknownIdException extends AuthException {}
-
-class InvalidEmailException extends AuthException {}
-
-class UnknownUsernameException extends AuthException {}
-
-class InvalidPasswordException extends AuthException {}
-
-class EmailNotVerifiedException extends AuthException {}
-
-class UserAlreadyExistsException extends AuthException {}
-
-class NotLoggedInException extends AuthException {}
-
-class InvalidSelectorTokenPairException extends AuthException {}
-
-class TokenExpiredException extends AuthException {}
-
-class TooManyRequestsException extends AuthException {}
-
-class DuplicateUsernameException extends AuthException {}
-
-class AmbiguousUsernameException extends AuthException {}
-
-class AttemptCancelledException extends AuthException {}
-
-class ResetDisabledException extends AuthException {}
-
-class ConfirmationRequestNotFound extends AuthException {}
-
-class AuthError extends \Exception {}
-
-class DatabaseError extends AuthError {}
-
-class MissingCallbackError extends AuthError {}
-
-class HeadersAlreadySentError extends AuthError {}
-
-class EmailOrUsernameRequiredError extends AuthError {}
diff --git a/src/HeadersAlreadySentError.php b/src/HeadersAlreadySentError.php
new file mode 100644
index 0000000..7cf8850
--- /dev/null
+++ b/src/HeadersAlreadySentError.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class HeadersAlreadySentError extends AuthError {}
diff --git a/src/InvalidEmailException.php b/src/InvalidEmailException.php
new file mode 100644
index 0000000..c2c1b52
--- /dev/null
+++ b/src/InvalidEmailException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class InvalidEmailException extends AuthException {}
diff --git a/src/InvalidPasswordException.php b/src/InvalidPasswordException.php
new file mode 100644
index 0000000..8ebaf54
--- /dev/null
+++ b/src/InvalidPasswordException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class InvalidPasswordException extends AuthException {}
diff --git a/src/InvalidSelectorTokenPairException.php b/src/InvalidSelectorTokenPairException.php
new file mode 100644
index 0000000..357e902
--- /dev/null
+++ b/src/InvalidSelectorTokenPairException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class InvalidSelectorTokenPairException extends AuthException {}
diff --git a/src/MissingCallbackError.php b/src/MissingCallbackError.php
new file mode 100644
index 0000000..ff1b694
--- /dev/null
+++ b/src/MissingCallbackError.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class MissingCallbackError extends AuthError {}
diff --git a/src/NotLoggedInException.php b/src/NotLoggedInException.php
new file mode 100644
index 0000000..347bb85
--- /dev/null
+++ b/src/NotLoggedInException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class NotLoggedInException extends AuthException {}
diff --git a/src/ResetDisabledException.php b/src/ResetDisabledException.php
new file mode 100644
index 0000000..22c05e5
--- /dev/null
+++ b/src/ResetDisabledException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class ResetDisabledException extends AuthException {}
diff --git a/src/TokenExpiredException.php b/src/TokenExpiredException.php
new file mode 100644
index 0000000..8b2dc37
--- /dev/null
+++ b/src/TokenExpiredException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class TokenExpiredException extends AuthException {}
diff --git a/src/TooManyRequestsException.php b/src/TooManyRequestsException.php
new file mode 100644
index 0000000..c88223b
--- /dev/null
+++ b/src/TooManyRequestsException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class TooManyRequestsException extends AuthException {}
diff --git a/src/UnknownIdException.php b/src/UnknownIdException.php
new file mode 100644
index 0000000..120e5e3
--- /dev/null
+++ b/src/UnknownIdException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class UnknownIdException extends AuthException {}
diff --git a/src/UnknownUsernameException.php b/src/UnknownUsernameException.php
new file mode 100644
index 0000000..d614cc3
--- /dev/null
+++ b/src/UnknownUsernameException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class UnknownUsernameException extends AuthException {}
diff --git a/src/UserAlreadyExistsException.php b/src/UserAlreadyExistsException.php
new file mode 100644
index 0000000..866781c
--- /dev/null
+++ b/src/UserAlreadyExistsException.php
@@ -0,0 +1,11 @@
+<?php
+
+/*
+ * PHP-Auth (https://github.com/delight-im/PHP-Auth)
+ * Copyright (c) delight.im (https://www.delight.im/)
+ * Licensed under the MIT License (https://opensource.org/licenses/MIT)
+ */
+
+namespace Delight\Auth;
+
+class UserAlreadyExistsException extends AuthException {}
diff --git a/src/UserManager.php b/src/UserManager.php
index fa31381..d45738d 100644
--- a/src/UserManager.php
+++ b/src/UserManager.php
@@ -15,8 +15,6 @@ use Delight\Db\PdoDsn;
 use Delight\Db\Throwable\Error;
 use Delight\Db\Throwable\IntegrityConstraintViolationException;
 
-require_once __DIR__ . '/Exceptions.php';
-
 /**
  * Abstract base class for components implementing user management
  *