start
open fun startFreeCall( @NonNull context: Context, @NonNull user: String, priority: Int, @Nullable completion: CompletionCallback)
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Call this method to start a new audio VoIP call
Parameters
context
the application context
user
the international phone number of called party that you want to start with the call
priority
the call priority
completion
is a block of code which will be invoked when the call is created or fail to be created