chore: Migrate authentication to new tables (#1929)

This work provides a foundation for a more pluggable authentication system such as the one outlined in #1317.

closes #1317

server/utils/avatars.test.js

@@ -0,0 +1,41 @@
+// @flow
+import { generateAvatarUrl } from "./avatars";
+
+it("should return clearbit url if available", async () => {
+  const url = await generateAvatarUrl({
+    id: "google",
+    domain: "google.com",
+    name: "Google",
+  });
+  expect(url).toBe("https://logo.clearbit.com/google.com");
+});
+
+it("should return tiley url if clearbit unavailable", async () => {
+  const url = await generateAvatarUrl({
+    id: "invalid",
+    domain: "example.invalid",
+    name: "Invalid",
+  });
+  expect(url).toBe(
+    "https://tiley.herokuapp.com/avatar/f1234d75178d892a133a410355a5a990cf75d2f33eba25d575943d4df632f3a4/I.png"
+  );
+});
+
+it("should return tiley url if domain not provided", async () => {
+  const url = await generateAvatarUrl({
+    id: "google",
+    name: "Google",
+  });
+  expect(url).toBe(
+    "https://tiley.herokuapp.com/avatar/bbdefa2950f49882f295b1285d4fa9dec45fc4144bfb07ee6acc68762d12c2e3/G.png"
+  );
+});
+
+it("should return tiley url if name not provided", async () => {
+  const url = await generateAvatarUrl({
+    id: "google",
+  });
+  expect(url).toBe(
+    "https://tiley.herokuapp.com/avatar/bbdefa2950f49882f295b1285d4fa9dec45fc4144bfb07ee6acc68762d12c2e3/U.png"
+  );
+});