diff --git a/app/Http/Controllers/credentials.json b/app/Http/Controllers/credentials.json
deleted file mode 100644
index f5377c7a8d2b71c2b14fd64803c5c691c1ea8031..0000000000000000000000000000000000000000
--- a/app/Http/Controllers/credentials.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "type": "service_account",
-  "project_id": "datalearn",
-  "private_key_id": "049b061b5b9de5f1f32142109307deb932917eea",
-  "private_key": "-----BEGIN PRIVATE KEY-----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\n7GGhIVGKIIejOAH/1Oe9Rg==\n-----END PRIVATE KEY-----\n",
-  "client_email": "aljabar@datalearn.iam.gserviceaccount.com",
-  "client_id": "112946705019770577593",
-  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
-  "token_uri": "https://oauth2.googleapis.com/token",
-  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
-  "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/aljabar%40datalearn.iam.gserviceaccount.com"
-}
diff --git a/resources/views/layouts/app.blade.php b/resources/views/layouts/app.blade.php
index fb447aad0e43beb124a6dfefe30a5455a0fa7662..e18428a2bbe941216aea4b22be721e28e75aeae5 100644
--- a/resources/views/layouts/app.blade.php
+++ b/resources/views/layouts/app.blade.php
@@ -13,7 +13,7 @@
     <script src="{{ asset('js/app.js') }}" defer></script>
     <script src="{{ asset('js/text.js') }}" defer></script>
     <script src="{{ asset('js/learn.js') }}" defer></script>
-    <script src="https://cdn.tiny.cloud/1/yaezxtmh9h1roazzxnkx70is63n62nbov3xskxim3rpnbcoj/tinymce/5/tinymce.min.js" referrerpolicy="origin"></script>
+    <script src="https://cdn.tiny.cloud/1/<API KEY>/tinymce/5/tinymce.min.js" referrerpolicy="origin"></script>
     <script>tinymce.init({selector:'mytextarea'});</script>
 
     <!-- Fonts -->
diff --git a/resources/views/learn.blade.php b/resources/views/learn.blade.php
index 7f65d9595370aa2b86493c3986d0a847981a3b00..3b28eae030fc781f7af799d95d4e1cfd3e1f91df 100644
--- a/resources/views/learn.blade.php
+++ b/resources/views/learn.blade.php
@@ -5,7 +5,7 @@
     <div class="row justify-content-center">
         <div class="col-lg-4">
             <div class="card">
-                <div class="card-header bg-primary text-white">{{ $topic_name }}</div>
+                <div class="card-header bg-primary text-white"><b>{{ $topic_name }}</b></div>
                 <div class="card-body">
                     <?php echo $content;?>
                 </div>