`METHOD_ADD` and `ADD_METHOD_TO` do not consider unsigned types

**Describe the bug**
Creating an `HttpController` with methods that take in `uint64_t` for example, and making a request to -1 will underflow and become `UINT64_MAX`.
Another related bug is if the URL contains characters, it still processes it.

**Expected behavior**
Should give 400 Bad Request upon error.

**Desktop (please complete the following information):**
- OS: Ubuntu

**Additional context**
For the time being the only choice is to take by string and do validation manually.