Ember QueryParams with "=" character

I have a relatively simple problem here but cant find a solution to it yet. Am using Ember and calling a route with query params. The code is below.

import Ember from "ember";

export default Ember.ObjectController.extend({
    queryParams : ['user_id','custom_lis_person_name_given']
    user_id : null,
    custom_lis_person_name_given : null
});

So now lets say i am calling my Route with the following url,

localhost:4200/index.html#/route1?user_id=123456&custom_lis_person_name_given=hello

Now the values of the query params are

user_id = 123456
custom_lis_person_name_given = hello

Now if i change my url to look like

localhost:4200/index.html#/route1?user_id=12345=6&custom_lis_person_name_given=hello
localhost:4200/index.html#/route1?user_id=123456=&custom_lis_person_name_given=hello

Now the value are calculated as

user_id = 12345 or user_id=123456
custom_lis_person_name_given = hello

So basically the value ends where it sees a = sign in the query parameter value. Is there a workaround for this? i need the user_id="12345=6" or "123456="

Maybe there are some hooks in controller or route which can do this. I tried serializeQueryParam and deserializeQueryParam but it did not help.

Thanks in Advance