text: import React from "react";
  
  export class Main extends React.Component {
      render() {
          return (
              <div>
                  <div className="row">
                      <div className="col-xs-12">
                          <h1>The Main Page</h1>
                      </div>
                  </div>
                  <div className="row">
                      <div className="col-xs-12">
                          <button
                              className="btn btn-primary"
                              onClick={() => this.props.changeUsername('Anna')}>Change the Username</button>
                      </div>
                  </div>
              </div>
          );
      }
  }