Added loadings animations to api page

public/sass_styles/_account.scss

@@ -75,6 +75,10 @@
             }
         }
 
+        form .disabled {
+            opacity: 0%;
+        }
+
         .flex-container-change-api-container {
             padding-left: 5vw;
 
@@ -116,4 +120,14 @@
             }
         }
     }
+}
+
+.loading-container {
+    width: 100%;
+    height: 83vh;
+
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    
 }