@spec create(String.t(), map() | keyword(), keyword()) ::
  {:ok, Twilio.Schemas.UserDefinedMessage.t()}
  | {:error, Infusion.Runtime.Error.t()}

Create a new User Defined Message for the given Call SID.

POST /2010-04-01/Accounts/{AccountSid}/Calls/{CallSid}/UserDefinedMessages.json

Path parameters

• call_sid (required) - The SID of the Call the User Defined Message is associated with.

{AccountSid} in the path is the :account_sid setting; pass account_sid: "..." as an option to use another.

Parameters

• content (required) - The User Defined Message in the form of URL-encoded JSON string.
• idempotency_key - A unique string value to identify API call. This should be a unique string value per API call and can be a randomly generated.

@spec create!(String.t(), map() | keyword(), keyword()) ::
  Twilio.Schemas.UserDefinedMessage.t()

Like create/3, but returns the result or raises Infusion.Runtime.Error.