Drupal\user\Plugin\Validation\Constraint

Checks if the plain text password is provided for editing a protected field.

Validates the ProtectedUserFieldConstraint constraint.

Checks if the user's email address is provided if required.

Checks if the user's email address is provided if required.

Checks if a user's email address is unique on the site.

Checks if a value is a valid user name.

Validates the UserName constraint.

Checks if a user name is unique on the site.