feat(wandb): check user can log into W&B

ColorizeTrainingWandb.ipynb

@@ -23,8 +23,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Install W&B Calback\n",
-    "!pip install wandb"
+    "# Install W&B Callback\n",
+    "#!pip install wandb"
    ]
   },
   {
@@ -67,6 +67,17 @@
     "## Setup"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Set up W&B: checks user can connect to W&B servers\n",
+    "# Note: set up API key the first time\n",
+    "wandb.login()"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,