removed uppercase from variable name

When I tried using my service I had received an error 'Missing ApiKey', what is supposed to mean that something is wrong with routing of input field value to the service. I'm not sure that my changes will fix the problem, but I presume that the problem can be in case-sensitive of names, so I've removed uppercase from variables name in the pull request. But, if you have any suggestions about the problem, would you mind giving me a helping hand and explaining. Thx!