parameters: (self, username: str)
docstring: Update the username
docstring_summary: Update the username
docstring_tokens: Update the username
function: def update_username(self, username: str):
          """ Update the username """
          self.username = username
          db.session.commit()
function_tokens: def update_username ( self , username : str ) : self . username = username db . session . commit ( )