refactor: Streamline user information retrieval and validation

- Refactored the user information retrieval process to improve efficiency.
- Enhanced validation logic for input parameters in the user handler.
- Updated UserService interface to support new retrieval methods.
- Improved error handling for user status checks before responding.

.gitea/workflows/build.yml

@@ -0,0 +1,72 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25'
+          cache: true
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Build
+        env:
+          GOOS: linux
+          GOARCH: amd64
+          CGO_ENABLED: 0
+        run: go build -v -o mcauth-linux-amd64 ./cmd/server
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: mcauth-linux-amd64
+          path: mcauth-linux-amd64
+
+  build-docker:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: code.littlelan.cn
+          username: ${{ secrets.GIT_USERNAME }}
+          password: ${{ secrets.GIT_TOKEN }}
+
+      - name: Download artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: mcauth-linux-amd64
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          build-args: |
+            BINARY_NAME=mcauth-linux-amd64
+          tags: |
+            code.littlelan.cn/${{ github.repository_owner }}/mcauth:latest
+            code.littlelan.cn/${{ github.repository_owner }}/mcauth:${{ github.sha }}
+          platforms: linux/amd64