Multiuser support (#60)

app/actions/user.ts

@@ -0,0 +1,27 @@
+"use server"
+
+import { signIn as signInNextAuth, signOut as signOutNextAuth } from '@/auth';
+
+export async function signIn(username: string, password: string) {
+  try {
+    const result = await signInNextAuth("credentials", {
+      username,
+      password,
+      redirect: false, // This needs to be passed as an option, not as form data
+    });
+    
+    return result;
+  } catch (error) {
+    throw new Error("Invalid credentials");
+  }
+}
+
+export async function signOut() {
+  try {
+    const result = await signOutNextAuth({
+        redirect: false,
+    })
+  } catch (error) {
+    throw new Error("Failed to sign out");
+  }
+}