Fix invitation link permission

Author: kamicut

pages/invitation.js

@@ -85,6 +85,12 @@ export default class Invitation extends Component {
     }
 
     if (!team) return null
+    const userId = this.props.user.uid
+    if (!userId) {
+      return <article className='inner page'>
+        You are not logged in. Sign in and come back to this link.
+      </article>
+    }
     return (
       <article className='inner page'>
         You have been invited to join <b>{team.name}</b>

pages/login.js

@@ -16,7 +16,7 @@ class Login extends Component {
     const OSM_NAME = publicRuntimeConfig.OSM_NAME
     return (
       <section className='inner page'>
-        <h1>Login Provider</h1>
+        <h1>Login</h1>
         <p>Teams uses {OSM_NAME} as your login, connect your {OSM_NAME} account!</p>
         <br />
         <Button href={`/oauth/openstreetmap?login_challenge=${this.props.challenge}`}>Login with {OSM_NAME}</Button>