EDataServer.Source.invoke_authenticate

### Method

# EDataServer Sourceinvoke_authenticate

since: 3.16

#### Declaration [src]

    void
    e_source_invoke_authenticate (
      ESource* source,
      const ENamedParameters* credentials,
      GCancellable* cancellable,
      GAsyncReadyCallback callback,
      gpointer user_data
    )

#### Description [src]

Asynchronously calls the InvokeAuthenticate method on the server side, thus the backend knows what credentials to use to connect to its (possibly remote) data store.

When the operation is finished, `callback` will be called. You can then call `e_source_invoke_authenticate_finish()` to get the result of the operation.

Available since: 3.16

This method completes asynchronously. Use `e_source_invoke_authenticate_finish()` inside the `GAsyncReadyCallback` to obtain the result of the operation.

#### Parameters

`credentials`

  Type: `ENamedParameters`

  An `ENamedParameters` structure with credentials to use; can be `NULL` to use those from the last call.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`cancellable`

  Type: `GCancellable`

  Optional `GCancellable` object, or `NULL`.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`callback`

  Type: `GAsyncReadyCallback`

  A `GAsyncReadyCallback` to call when the request is satisfied.

  The argument can be `NULL`.

`user_data`

  Type: `gpointer`

  Data to pass to the callback function.

  The argument can be `NULL`.
  The data is owned by the caller of the method.