Update Rust example to include non-admin logic and align with docs (#131)

Author: danielfrankcom

.github/workflows/rust-sqlx-integ-test.yml

@@ -47,8 +47,8 @@ jobs:
     - name: Configure and run integration tests for SQLx
       working-directory: ./rust/sqlx
       env:
+        CLUSTER_USER: "admin"
         CLUSTER_ENDPOINT: ${{ secrets.RUST_SQLX_CLUSTER_ENDPOINT }}
         REGION: ${{ secrets.RUST_SQLX_CLUSTER_REGION }}
       run: |
-        cargo build
-        cargo test
+        cargo run