diff --git a/main.py b/main.py
new file mode 100644
index 0000000000..bef7c28a80
--- /dev/null
+++ b/main.py
@@ -0,0 +1,53 @@
+from fastapi import APIRouter, Depends, FastAPI, Request
+from fastapi.testclient import TestClient
+
+app = FastAPI()
+
+
+async def check_current_user(request: Request, user_id: str):
+    # Imagine, there's a check that user exists
+    request.state.current_user_id = user_id
+
+
+async def check_current_project(request: Request, project_id: str):
+    # Imagine, there's a check that project exists
+    request.state.current_project_id = project_id
+
+
+async def current_user(request: Request):
+    return request.state.current_user_id
+
+
+async def current_project(request: Request):
+    return request.state.current_project_id
+
+
+router_users = APIRouter(prefix="/users")
+
+router_projects = APIRouter(
+    prefix="/{user_id}/projects",
+    dependencies=[Depends(check_current_user)],
+)
+
+router_issues = APIRouter(
+    prefix="/{project_id}/issues",
+    dependencies=[Depends(check_current_project)],
+)
+
+
+@router_issues.get("/{issue_id}")
+async def get_issue(
+    issue_id: str,
+    current_user: str = Depends(current_user),
+    current_project: str = Depends(current_project),
+):
+    return {
+        "user_id": current_user,
+        "project_id": current_project,
+        "issue_id": issue_id,
+    }
+
+
+router_projects.include_router(router_issues)
+router_users.include_router(router_projects)
+app.include_router(router_users)
\ No newline at end of file