diff --git a/alembic.ini b/alembic.ini
index 967028a6..be000607 100644
--- a/alembic.ini
+++ b/alembic.ini
@@ -21,7 +21,7 @@ script_location = anitya/db/migrations
 # sourceless = false
 
 #sqlalchemy.url = driver://user:pass@localhost/dbname
-sqlalchemy.url = sqlite:////var/tmp/anitya-dev.sqlite
+sqlalchemy.url = postgresql://postgres:anypasswordworkslocally@postgres/anitya
 
 
 # Logging configuration
diff --git a/anitya/auth.py b/anitya/auth.py
index 8a728086..88823074 100644
--- a/anitya/auth.py
+++ b/anitya/auth.py
@@ -84,6 +84,10 @@ def auth(name):  # pragma: no cover
             Session.add(new_user)
             Session.commit()
             user = new_user
+        elif user.username != user_info["username"]:
+            user.username = user_info["username"]
+            Session.add(user)
+            Session.commit()
         _log.debug("Logging as user %s", user.email)
         flask_login.login_user(user)
 
diff --git a/anitya/db/migrations/versions/ebc827e80373_remove_unique_attribute_from_username.py b/anitya/db/migrations/versions/ebc827e80373_remove_unique_attribute_from_username.py
new file mode 100644
index 00000000..ae78b777
--- /dev/null
+++ b/anitya/db/migrations/versions/ebc827e80373_remove_unique_attribute_from_username.py
@@ -0,0 +1,26 @@
+"""Remove unique attribute from username
+
+Revision ID: ebc827e80373
+Revises: 8ba7d4c42044
+Create Date: 2024-12-05 16:24:01.098473
+"""
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "ebc827e80373"
+down_revision = "8ba7d4c42044"
+
+
+def upgrade():
+    """Alembic migration."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint("ix_users_username", "users", type_="unique")
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    """Downgrade migration."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_unique_constraint("ix_users_username", "users", ["username"])
+    # ### end Alembic commands ###
diff --git a/anitya/db/models.py b/anitya/db/models.py
index 4e84cbec..6b000e42 100644
--- a/anitya/db/models.py
+++ b/anitya/db/models.py
@@ -985,7 +985,7 @@ class User(Base):
     # SMTP says 256 is the maximum length of a path:
     # https://tools.ietf.org/html/rfc5321#section-4.5.3
     email = sa.Column(sa.String(256), nullable=False, index=True, unique=True)
-    username = sa.Column(sa.String(256), nullable=False, index=True, unique=True)
+    username = sa.Column(sa.String(256), nullable=False, index=True)
     active = sa.Column(sa.Boolean, default=True)
     admin = sa.Column(sa.Boolean, default=False)
 
@@ -1001,6 +1001,8 @@ def is_admin(self):
         if not self.admin:
             if six.text_type(self.id) in anitya_config.get("ANITYA_WEB_ADMINS", []):
                 self.admin = True
+            if six.text_type(self.email) in anitya_config.get("ANITYA_WEB_ADMINS", []):
+                self.admin = True
         return self.admin
 
     @property
diff --git a/anitya/tests/db/test_models.py b/anitya/tests/db/test_models.py
index 32957ab7..ad7728a1 100644
--- a/anitya/tests/db/test_models.py
+++ b/anitya/tests/db/test_models.py
@@ -1083,17 +1083,6 @@ def test_user_email_unique(self):
         self.session.add(user)
         self.assertRaises(IntegrityError, self.session.commit)
 
-    def test_username_unique(self):
-        """Assert User usernames have a uniqueness constraint on them."""
-        user = models.User(email="user@fedoraproject.org", username="user")
-
-        self.session.add(user)
-        self.session.commit()
-
-        user = models.User(email="user2@fedoraproject.org", username="user")
-        self.session.add(user)
-        self.assertRaises(IntegrityError, self.session.commit)
-
     def test_default_active(self):
         """Assert User usernames have a uniqueness constraint on them."""
         user = models.User(email="user@fedoraproject.org", username="user")
@@ -1139,6 +1128,21 @@ def test_is_admin_configured(self):
             self.assertTrue(user.is_admin)
             self.assertTrue(user.admin)
 
+    def test_is_admin_configured_email(self):
+        """Assert default value for admin flag."""
+        user = models.User(email="user@fedoraproject.org", username="user", admin=False)
+        self.session.add(user)
+        self.session.commit()
+
+        mock_dict = mock.patch.dict(
+            "anitya.config.config", {"ANITYA_WEB_ADMINS": [six.text_type(user.email)]}
+        )
+
+        with mock_dict:
+            self.assertFalse(user.admin)
+            self.assertTrue(user.is_admin)
+            self.assertTrue(user.admin)
+
     def test_to_dict(self):
         """Assert the correct dictionary is returned."""
         user = models.User(email="user@fedoraproject.org", username="user")