Use coroutine outside viewModelScope

GoalDataSource.kt

class GoalDataSource(private val getReactGoalsUseCase: GetReactGoalsUseCase) :
    PositionalDataSource<Goal>() {

    override fun loadRange(params: LoadRangeParams, callback: LoadRangeCallback<Goal>) {
        CoroutineScope(Dispatchers.Main).launch {
            getReactGoalsUseCase.invoke(this, GetReactGoalsUseCase.Param(params.startPosition)) {
                it.either({}, { goals: List<Goal> ->
                    callback.onResult(goals)
                })
            }
        }
    }

    override fun loadInitial(params: LoadInitialParams, callback: LoadInitialCallback<Goal>) {
        CoroutineScope(Dispatchers.Main).launch {
            getReactGoalsUseCase.invoke(
                this,
                GetReactGoalsUseCase.Param(params.requestedStartPosition)
            ) {
                it.either({}, { goals: List<Goal> ->
                    callback.onResult(goals, 0)
                })
            }
        }
    }
}