A Sessions object

I am working on a java client that makes REST aPI alls to an API server . Every time it requests an API it authenticates itself with an auth token.

I want to wrap this information in a sessions object to have it handy for objects making RESt calls

public class MySession {
    public static String api_endpoint ;
    public static String username ;
    public static String password ;




    public MySession(String api_endpoint, 
            String auth_endpoint, S
            String username, String password,) {

        this.api_endpoint = api_endpoint;
        this.auth_endpoint = auth_endpoint;
        this.username = username;
        this.password = password;



    }



    public String getAuthToken()  {
        // use the mySession.user and mySession.pass to get the auth token
        return authToken;

    }


}



public class MyOtherClass {

MySession mysession;

public (MySession msession) {
this.mysession = msession;
}

public void makeRestCall() {

String token = msession.getAuthToken();
// use token and make REST call
}

Is this the right way to write the getAuthToken method? Is there any flaw in my design?