ExerciseManager => Update the get function to accept git url in addition of id

ExpressAPI/src/managers/ExerciseManager.ts

@@ -4,7 +4,9 @@ import db           from '../helpers/DatabaseHelper';
 
 
 class ExerciseManager {
-    async get(id: string, include: Prisma.ExerciseInclude | undefined = undefined): Promise<Exercise | undefined> {
+    async get(idOrUrl: string, include: Prisma.ExerciseInclude | undefined = undefined): Promise<Exercise | undefined> {
+        const id = idOrUrl.replace('.git', '').split('_').pop()!;
+
         return await db.exercise.findUnique({
                                                 where  : {
                                                     id: id