text: import datetime
  
  from flask.json import jsonify
  
  from flask_monitoringdashboard import blueprint
  from flask_monitoringdashboard.core.auth import secure
  from flask_monitoringdashboard.core.custom_graph import get_custom_graphs
  from flask_monitoringdashboard.database import row2dict, session_scope
  from flask_monitoringdashboard.database.custom_graph import get_graph_data
  
  
  @blueprint.route('/api/custom_graphs')
  @secure
  def custom_graphs():
      graphs = get_custom_graphs()
      if not graphs:
          return jsonify([])
      return jsonify([row2dict(row) for row in graphs if row is not None])
  
  
  @blueprint.route('/api/custom_graph/<graph_id>/<start_date>/<end_date>')
  @secure
  def custom_graph(graph_id, start_date, end_date):
      start_date = datetime.datetime.strptime(start_date, '%Y-%m-%d')
      end_date = datetime.datetime.strptime(end_date, '%Y-%m-%d')
      with session_scope() as session:
          return jsonify(get_graph_data(session, graph_id, start_date, end_date))
  