code: import stripe
  stripe.api_key = "sk_test_your_key"
  
  stripe.Source.modify(
    "src_1LSdsx2eZvKYlo2CynOAUbXz",
    metadata={"order_id": "6735"},
  )
  '''Response {
    "id": "src_1LSdsx2eZvKYlo2CynOAUbXz",
    "object": "source",
    "ach_credit_transfer": {
      "account_number": "test_52796e3294dc",
      "routing_number": "110000000",
      "fingerprint": "ecpwEzmBOSMOqQTL",
      "bank_name": "TEST BANK",
      "swift_code": "TSTEZ122"
    },
    "amount": null,
    "client_secret": "src_client_secret_6jh1NqD1xGAI0sVLZcI5kKWy",
    "created": 1659518943,
    "currency": "usd",
    "flow": "receiver",
    "livemode": false,
    "metadata": {
      "order_id": "6735"
    },
    "owner": {
      "address": null,
      "email": "jenny.rosen@example.com",
      "name": null,
      "phone": null,
      "verified_address": null,
      "verified_email": null,
      "verified_name": null,
      "verified_phone": null
    },
    "receiver": {
      "address": "121042882-38381234567890123",
      "amount_charged": 0,
      "amount_received": 0,
      "amount_returned": 0,
      "refund_attributes_method": "email",
      "refund_attributes_status": "missing"
    },
    "redaction": null,
    "statement_descriptor": null,
    "status": "pending",
    "type": "ach_credit_transfer",
    "usage": "reusable"
  }'''
nl: Update a sourceUpdates the specified source by setting the values of the parameters passed. Any parameters not provided will be left unchanged.
  This request accepts the metadata and owner as arguments. It is also possible to update type specific information for selected payment methods. Please refer to our payment method guides for more detail.Parameters amount optional Amount associated with the source. metadata optional dictionary Set of key-value pairs that you can attach to an object. This can be useful for storing additional information about the object in a structured format. Individual keys can be unset by posting an empty value to them. All keys can be unset by posting an empty value to metadata. owner optional dictionary Information about the owner of the payment instrument that may be used or required by particular source types.Show child parametersMore parametersExpand all  mandate optional dictionary   source_order optional dictionary ReturnsReturns the source object if the update succeeded. This call will raise an error if update parameters are invalid