Use base64 library to encode basic auth 🤦

Buffer being not enabled on Vercel Edge Functions

pnpm-lock.yaml

@@ -8,6 +8,7 @@ specifiers:
   '@sveltejs/kit': ^1.0.0-next.484
   '@typescript-eslint/eslint-plugin': ^5.37.0
   '@typescript-eslint/parser': ^5.37.0
+  base-64: ^1.0.0
   browserslist: ^4.21.4
   cssnano: ^5.1.13
   dayjs: ^1.11.5
@@ -51,6 +52,7 @@ devDependencies:
   '@sveltejs/kit': 1.0.0-next.484_svelte@3.50.1+vite@3.1.2
   '@typescript-eslint/eslint-plugin': 5.37.0_22c5fnooleyfkzrkkgdmel5kmi
   '@typescript-eslint/parser': 5.37.0_irgkl5vooow2ydyo6aokmferha
+  base-64: 1.0.0
   browserslist: 4.21.4
   cssnano: 5.1.13_postcss@8.4.16
   eslint: 8.23.1
@@ -792,6 +794,10 @@ packages:
     resolution: {integrity: sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==}
     dev: true
 
+  /base-64/1.0.0:
+    resolution: {integrity: sha512-kwDPIFCGx0NZHog36dj+tHiwP4QMzsZ3AgMViUBKI0+V5n4U0ufTCUMhnQ04diaRI8EX/QcPfql7zlhZ7j4zgg==}
+    dev: true
+
   /binary-extensions/2.2.0:
     resolution: {integrity: sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA==}
     engines: {node: '>=8'}