text: # API messages
  
  USER_DOES_NOT_EXIST_ERROR = "user does not exist"
  ARTICLE_DOES_NOT_EXIST_ERROR = "article does not exist"
  ARTICLE_ALREADY_EXISTS = "article already exists"
  USER_IS_NOT_AUTHOR_OF_ARTICLE = "you are not an author of this article"
  
  INCORRECT_LOGIN_INPUT = "incorrect email or password"
  USERNAME_TAKEN = "user with this username already exists"
  EMAIL_TAKEN = "user with this email already exists"
  
  UNABLE_TO_FOLLOW_YOURSELF = "user can not follow him self"
  UNABLE_TO_UNSUBSCRIBE_FROM_YOURSELF = "user can not unsubscribe from him self"
  USER_IS_NOT_FOLLOWED = "you don't follow this user"
  USER_IS_ALREADY_FOLLOWED = "you follow this user already"
  
  WRONG_TOKEN_PREFIX = "unsupported authorization type"  # noqa: S105
  MALFORMED_PAYLOAD = "could not validate credentials"
  
  ARTICLE_IS_ALREADY_FAVORITED = "you are already marked this articles as favorite"
  ARTICLE_IS_NOT_FAVORITED = "article is not favorited"
  
  COMMENT_DOES_NOT_EXIST = "comment does not exist"
  
  AUTHENTICATION_REQUIRED = "authentication required"
  
  