docs: def add_auto_increment(self, table, name):
          """Modify an existing column."""
          # Get current column definition and add auto_incrementing
          definition = self.get_column_definition(table, name) + ' AUTO_INCREMENT'
  
          # Concatenate and execute modify statement
          self.execute("ALTER TABLE {0} MODIFY {1}".format(table, definition))
          self._printer('\tAdded AUTO_INCREMENT to column {0}'.format(name))
          return True