docs(providers): update surrealdb.mdx (#11905)

* Update surrealdb.mdx

* fix: correct params to surrealDB adapter

* Update surrealdb.mdx

---------

Co-authored-by: Balázs Orbán <info@balazsorban.com>

docs/pages/getting-started/adapters/surrealdb.mdx

@@ -105,26 +105,34 @@ The SurrealDB adapter does not handle connections automatically, so you will hav
 import { Surreal } from "surrealdb.js"
 
 const connectionString = process.env.AUTH_SURREALDB_CONNECTION
-const user = process.env.AUTH_SURREALDB_USERNAME
-const pass = process.env.AUTH_SURREALDB_PASSWORD
-const ns = process.env.AUTH_SURREALDB_NS
-const db = process.env.AUTH_SURREALDB_DB
+const username = process.env.AUTH_SURREALDB_USERNAME
+const password = process.env.AUTH_SURREALDB_PASSWORD
+const namespace = process.env.AUTH_SURREALDB_NAMESPACE
+const database = process.env.AUTH_SURREALDB_DATABASE
+if (!connectionString || !username || !password || !namespace || !database) {
+  throw new Error(
+    "SurrealDB connection string, username, password, namespace, and database are required"
+  )
+}
 
 const clientPromise = new Promise<Surreal>(async (resolve, reject) => {
   const db = new Surreal()
   try {
     await db.connect(`${connectionString}/rpc`, {
-      ns,
-      db,
-      auth: { user, pass },
+      namespace,
+      database,
+      auth: {
+        username,
+        password,
+      },
     })
     resolve(db)
   } catch (e) {
     reject(e)
   }
 })
 
-// Export a module-scoped MongoClient promise. By doing this in a
+// Export a module-scoped Promise<Surreal>. By doing this in a
 // separate module, the client can be shared across functions.
 export default clientPromise
 ```
@@ -137,19 +145,27 @@ Useful in serverless environments like Vercel.
 import { ExperimentalSurrealHTTP } from "surrealdb.js"
 
 const connectionString = process.env.AUTH_SURREALDB_CONNECTION
-const user = process.env.AUTH_SURREALDB_USERNAME
-const pass = process.env.AUTH_SURREALDB_PASSWORD
-const ns = process.env.AUTH_SURREALDB_NS
-const db = process.env.AUTH_SURREALDB_DB
+const username = process.env.AUTH_SURREALDB_USERNAME
+const password = process.env.AUTH_SURREALDB_PASSWORD
+const namespace = process.env.AUTH_SURREALDB_NAMESPACE
+const database = process.env.AUTH_SURREALDB_DATABASE
+if (!connectionString || !username || !password || !namespace || !database) {
+  throw new Error(
+    "SurrealDB connection string, username, password, namespace, and database are required"
+  )
+}
 
 const clientPromise = new Promise<ExperimentalSurrealHTTP<typeof fetch>>(
   async (resolve, reject) => {
     try {
       const db = new ExperimentalSurrealHTTP(connectionString, {
         fetch,
-        ns,
-        db,
-        auth: { user, pass },
+        namespace,
+        database,
+        auth: {
+          username,
+          password,
+        },
       })
       resolve(db)
     } catch (e) {
@@ -158,7 +174,7 @@ const clientPromise = new Promise<ExperimentalSurrealHTTP<typeof fetch>>(
   }
 )
 
-// Export a module-scoped MongoClient promise. By doing this in a
+// Export a module-scoped Promise<Surreal>. By doing this in a
 // separate module, the client can be shared across functions.
 export default clientPromise
 ```