diff --git a/imports/api/custom-users.js b/imports/api/custom-users.js
index c7e5a868..812d66cc 100644
--- a/imports/api/custom-users.js
+++ b/imports/api/custom-users.js
@@ -26,70 +26,72 @@ if (Meteor.isServer) {
 
 Meteor.methods({
   'users.invitationLogin': function (code) {
-    // Reusable matcher object for the next mongo queries
-    const codeMatcher = {
-      receivedInvites: {
-        $elemMatch: {
-          accessToken: code
+    if (Meteor.isServer) {
+      // Reusable matcher object for the next mongo queries
+      const codeMatcher = {
+        receivedInvites: {
+          $elemMatch: {
+            accessToken: code
+          }
         }
       }
-    }
 
-    // Finding the user for this invite code (and checking whether one-click login is still allowed for it)
-    const invitedUser = Meteor.users.findOne(Object.assign({
-      'profile.isLimited': true
-    }, codeMatcher), {
-      fields: Object.assign({
-        emails: 1
-      }, codeMatcher)
-    })
-    if (!invitedUser) {
-      console.log('The code is invalid or login is required first')
-      throw new Meteor.Error('The code is invalid or login is required first')
-    }
+      // Finding the user for this invite code (and checking whether one-click login is still allowed for it)
+      const invitedUser = Meteor.users.findOne(Object.assign({
+        'profile.isLimited': true
+      }, codeMatcher), {
+        fields: Object.assign({
+          emails: 1
+        }, codeMatcher)
+      })
+      if (!invitedUser) {
+        console.log('The code is invalid or login is required first')
+        throw new Meteor.Error('The code is invalid or login is required first')
+      }
 
-    // Track accesses
-    AccessInvitations.upsert({
-      userId: invitedUser._id,
-      unitId: invitedUser.receivedInvites[0].unitId
-    }, {
-      $set: {
+      // Track accesses
+      AccessInvitations.upsert({
         userId: invitedUser._id,
         unitId: invitedUser.receivedInvites[0].unitId
-      },
-      $push: {
-        dates: new Date()
-      }
-    })
+      }, {
+        $set: {
+          userId: invitedUser._id,
+          unitId: invitedUser.receivedInvites[0].unitId
+        },
+        $push: {
+          dates: new Date()
+        }
+      })
 
-    // Keeping track of how many times the user used this invitation to access the system
-    Meteor.users.update({
-      _id: invitedUser._id,
-      'receivedInvites.accessToken': code
-    }, {
-      $inc: {
-        'receivedInvites.$.accessedCount': 1
-      }
-    })
-    console.log(`${invitedUser.emails[0].address} is using an invitation to access the system`)
+      // Keeping track of how many times the user used this invitation to access the system
+      Meteor.users.update({
+        _id: invitedUser._id,
+        'receivedInvites.accessToken': code
+      }, {
+        $inc: {
+          'receivedInvites.$.accessedCount': 1
+        }
+      })
+      console.log(`${invitedUser.emails[0].address} is using an invitation to access the system`)
 
-    // Resetting the password to something new the client-side could use for an automated login
-    const randPass = randToken.generate(12)
-    Accounts.setPassword(invitedUser._id, randPass, {logout: true})
+      // Resetting the password to something new the client-side could use for an automated login
+      const randPass = randToken.generate(12)
+      Accounts.setPassword(invitedUser._id, randPass, {logout: true})
 
-    const invitedByDetails = (() => {
-      const { emails: [{ address: email }], profile: { name } } =
-        Meteor.users.findOne(invitedUser.receivedInvites[0].invitedBy)
+      const invitedByDetails = (() => {
+        const { emails: [{ address: email }], profile: { name } } =
+          Meteor.users.findOne(invitedUser.receivedInvites[0].invitedBy)
+        return {
+          email,
+          name
+        }
+      })()
       return {
-        email,
-        name
+        email: invitedUser.emails[0].address,
+        pw: randPass,
+        caseId: invitedUser.receivedInvites[0].caseId,
+        invitedByDetails
       }
-    })()
-    return {
-      email: invitedUser.emails[0].address,
-      pw: randPass,
-      caseId: invitedUser.receivedInvites[0].caseId,
-      invitedByDetails
     }
   },
   'users.updateMyName': function (name) {
diff --git a/imports/state/epics/fetch-invitation-credentials.js b/imports/state/epics/fetch-invitation-credentials.js
index 603b1dfb..f67a646a 100644
--- a/imports/state/epics/fetch-invitation-credentials.js
+++ b/imports/state/epics/fetch-invitation-credentials.js
@@ -18,7 +18,7 @@ export const fetchInvitationCredentials = action$ => action$
   .ofType(FETCH_INVITATION_CREDENTIALS)
   .switchMap(({code}) => {
     const meteorResult$ = new Subject()
-    Meteor.call('users.invitationLogin', code, (error, {email, pw, caseId, invitedByDetails}) => {
+    Meteor.call('users.invitationLogin', code, (error, result) => {
       if (error) {
         meteorResult$.next({
           type: ERROR_INVITATION_CREDENTIALS,
@@ -27,6 +27,7 @@ export const fetchInvitationCredentials = action$ => action$
         meteorResult$.complete()
         return
       }
+      const { email, pw, caseId, invitedByDetails } = result
       meteorResult$.next({
         type: LOGIN_INVITATION_CREDENTIALS
       })