tsk-50: Create Special endpoint for services to obtain a token (#53)

Reviewed-on: phoenix/icarus_auth#53
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

src/callers/mod.rs

@@ -7,4 +7,5 @@ pub mod endpoints {
     pub const REGISTER: &str = "/api/v2/register";
     pub const DBTEST: &str = "/api/v2/test/db";
     pub const LOGIN: &str = "/api/v2/login";
+    pub const SERVICE_LOGIN: &str = "/api/v2/service/login";
 }