# Companion

object Companion

## Functions

builder
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@JvmStatic
fun builder(): UserControllerBuilder

Returns a UserControllerBuilder instance that can be used to create a new UserController, which is used to register new user and its Push token for the Sinch Managed Push to allow receiving incoming calls via push for this specified user on this very device. The UserControllerBuilder requires that a os.android.Looper is attached to the current thread on which the build methods invoked or CallbackHandler is provided via an optional parameter.