Email address not validated: send a dedicated error message.

src/requests/login.cr

@@ -37,7 +37,7 @@ class AuthD::Request
 			# In case the user hasn't validated his email address,
 			# authentication shouldn't be possible.
 			if user.contact.activation_key
-				return Response::ErrorInvalidCredentials.new
+				return Response::ErrorEmailAddressNotValidated.new
 			end
 
 			# MIGRATION

src/responses/errors.cr

@@ -102,4 +102,10 @@ class AuthD::Response
 		end
 	end
 	AuthD.responses << ErrorPasswordTooLong
+
+	IPC::JSON.message ErrorEmailAddressNotValidated, 36 do
+		def initialize()
+		end
+	end
+	AuthD.responses << ErrorEmailAddressNotValidated
 end