diff --git a/data-browser/src/components/RegisterSignIn.tsx b/data-browser/src/components/RegisterSignIn.tsx
index 6c0d13f0..fb939fc7 100644
--- a/data-browser/src/components/RegisterSignIn.tsx
+++ b/data-browser/src/components/RegisterSignIn.tsx
@@ -8,7 +8,13 @@ import {
 import React, { FormEvent, useCallback, useEffect, useState } from 'react';
 import { useSettings } from '../helpers/AppSettings';
 import { Button } from './Button';
-import { Agent, nameRegex, useRegister, useServerURL } from '@tomic/react';
+import {
+  Agent,
+  nameRegex,
+  register,
+  useServerURL,
+  useStore,
+} from '@tomic/react';
 import Field from './forms/Field';
 import { InputWrapper, InputStyled } from './forms/InputStyles';
 import { Row } from './Row';
@@ -30,7 +36,7 @@ export function RegisterSignIn({
 }: React.PropsWithChildren<RegisterSignInProps>): JSX.Element {
   const { dialogProps, show } = useDialog();
   const { agent } = useSettings();
-  const [register, setRegister] = useState(true);
+  const [isRegister, setRegister] = useState(true);
 
   if (agent) {
     return <>{children}</>;
@@ -56,7 +62,9 @@ export function RegisterSignIn({
             Sign In
           </Button>
         </Row>
-        <Dialog {...dialogProps}>{register ? <Register /> : <SignIn />}</Dialog>
+        <Dialog {...dialogProps}>
+          {isRegister ? <Register /> : <SignIn />}
+        </Dialog>
       </>
     );
 }
@@ -69,8 +77,9 @@ function Register() {
   const [newAgent, setNewAgent] = useState<Agent | undefined>(undefined);
   const [serverUrlStr] = useServerURL();
   const [nameErr, setErr] = useState<Error | undefined>(undefined);
-  const register = useRegister();
+  const doRegister = useCallback(register, []);
   const { setAgent } = useSettings();
+  const store = useStore();
 
   const serverUrl = new URL(serverUrlStr);
   serverUrl.host = `${name}.${serverUrl.host}`;
@@ -95,7 +104,11 @@ function Register() {
       }
 
       try {
-        const { driveURL: newDriveURL, agent } = await register(name, email);
+        const { driveURL: newDriveURL, agent } = await doRegister(
+          store,
+          name,
+          email,
+        );
         setDriveURL(newDriveURL);
         setSecret(agent.buildSecret());
         setNewAgent(agent);
diff --git a/lib/src/authentication.ts b/lib/src/authentication.ts
index 16418dd4..b52de4f6 100644
--- a/lib/src/authentication.ts
+++ b/lib/src/authentication.ts
@@ -1,7 +1,9 @@
 import {
   Agent,
+  generateKeyPair,
   getTimestampNow,
   HeadersObject,
+  properties,
   signToBase64,
   Store,
 } from './index.js';
@@ -111,3 +113,49 @@ export const checkAuthenticationCookie = (): boolean => {
 
   return matches.length > 0;
 };
+
+export interface RegisterResult {
+  agent: Agent;
+  driveURL: string;
+}
+
+/** Only lowercase chars, numbers and a hyphen */
+export const nameRegex = '^[a-z0-9_-]+';
+
+/** Creates a new Agent + Drive using a shortname and email. Uses the serverURL from the Store. */
+export const register = async (
+  store: Store,
+  name: string,
+  email: string,
+): Promise<RegisterResult> => {
+  const keypair = await generateKeyPair();
+  const agent = new Agent(keypair.privateKey);
+  const publicKey = await agent.getPublicKey();
+  const url = new URL('/register', store.getServerUrl());
+  url.searchParams.set('name', name);
+  url.searchParams.set('public-key', publicKey);
+  url.searchParams.set('email', email);
+  const resource = await store.getResourceAsync(url.toString());
+  const driveURL = resource.get(properties.redirect.destination) as string;
+  const agentSubject = resource.get(
+    properties.redirect.redirectAgent,
+  ) as string;
+
+  if (resource.error) {
+    throw resource.error;
+  }
+
+  if (!driveURL) {
+    throw new Error('No redirect destination');
+  }
+
+  if (!agentSubject) {
+    throw new Error('No agent returned');
+  }
+
+  agent.subject = agentSubject;
+
+  store.setAgent(agent);
+
+  return { driveURL, agent };
+};
diff --git a/react/src/index.ts b/react/src/index.ts
index 78becf7f..5ee70cf0 100644
--- a/react/src/index.ts
+++ b/react/src/index.ts
@@ -30,5 +30,4 @@ export * from './useImporter.js';
 export * from './useLocalStorage.js';
 export * from './useMarkdown.js';
 export * from './useServerSearch.js';
-export * from './useRegister.js';
 export * from '@tomic/lib';
diff --git a/react/src/useRegister.ts b/react/src/useRegister.ts
deleted file mode 100644
index 662867dd..00000000
--- a/react/src/useRegister.ts
+++ /dev/null
@@ -1,59 +0,0 @@
-import { useCallback } from 'react';
-import { Agent, generateKeyPair, properties, useStore } from '.';
-
-/** Only allows lowercase chars and numbers  */
-export const nameRegex = '^[a-z0-9_-]+';
-
-interface RegisterResult {
-  agent: Agent;
-  driveURL: string;
-}
-
-// Allow users to register and create a drive on the `/register` route.
-export function useRegister(): (
-  userName: string,
-  email: string,
-) => Promise<RegisterResult> {
-  const store = useStore();
-
-  const register = useCallback(
-    /** Returns redirect URL of new drie on success */
-    async (name: string, email: string): Promise<RegisterResult> => {
-      const keypair = await generateKeyPair();
-      const newAgent = new Agent(keypair.privateKey);
-      const publicKey = await newAgent.getPublicKey();
-      const url = new URL('/register', store.getServerUrl());
-      url.searchParams.set('name', name);
-      url.searchParams.set('public-key', publicKey);
-      url.searchParams.set('email', email);
-      const resource = await store.getResourceAsync(url.toString());
-      const destination = resource.get(
-        properties.redirect.destination,
-      ) as string;
-      const agentSubject = resource.get(
-        properties.redirect.redirectAgent,
-      ) as string;
-
-      if (resource.error) {
-        throw resource.error;
-      }
-
-      if (!destination) {
-        throw new Error('No redirect destination');
-      }
-
-      if (!agentSubject) {
-        throw new Error('No agent returned');
-      }
-
-      newAgent.subject = agentSubject;
-
-      store.setAgent(newAgent);
-
-      return { driveURL: destination, agent: newAgent };
-    },
-    [],
-  );
-
-  return register;
-}