chore: fix api calls in the org docs

docs/content/docs/plugins/organization.mdx

@@ -551,7 +551,7 @@ await authClient.organization.rejectInvitation({
 To get an invitation you can use the `getInvitation` function provided by the client. You need to provide the invitation id as a query parameter.
 
 ```ts title="auth-client.ts"
-authClient.organization.getInvitation({
+await authClient.organization.getInvitation({
     query: {
         id: params.id
     }
@@ -610,7 +610,7 @@ If you want to add a member directly to an organization without sending an invit
 ```ts title="api.ts"
 import { auth } from "@/auth";
 
-auth.api.addMember({
+await auth.api.addMember({
   body: {
       userId: "user-id",
       organizationId: "organization-id",