how to use props in data vue code example

Example 1: vue get props into data

props : {
        users : Array,
        currentuser: Number,
        todoId : Number
    },
    mounted() {
        this.current = this.currentuser
    },
    data(){
        return{
            current: null
        }

Example 2: vuejs accessing props from data

data: function() {
  var theData = {
    somevar: this.messageId,
    // other object attributes
  }

  return theData;
}