docs: def grant_db_access(conn, schema, table, role):
      r"""Gives access to database users/ groups
  
      Parameters
      ----------
      conn : sqlalchemy connection object
          A valid connection to a database
      schema : str
          The database schema
      table : str
          The database table
      role : str
          database role that access is granted to
  
      """
      grant_str = """GRANT ALL ON TABLE {schema}.{table}
      TO {role} WITH GRANT OPTION;""".format(schema=schema, table=table,
                                             role=role)
  
      conn.execute(grant_str)