Adding caller code

src/callers/mod.rs

@@ -0,0 +1,8 @@
+pub mod common;
+pub mod register;
+
+pub mod endpoints {
+    pub const ROOT: &str = "/";
+    pub const REGISTER: &str = "/api/v2/register";
+    pub const DBTEST: &str = "/api/v2/test/db";
+}