fix(bearer): certain sign-in endpoints won't give bearer token v2 (#4330)

docs/content/docs/plugins/bearer.mdx

@@ -22,6 +22,15 @@ export const auth = betterAuth({
 });
 ```
 
+And in your auth client as well:
+
+```ts title="auth-client.ts"
+import { bearerClient } from "better-auth/client/plugins";
+export const authClient = createAuthClient({
+    plugins: [bearerClient()]
+});
+```
+
 ## How to Use Bearer Tokens
 
 ### 1. Obtain the Bearer Token
@@ -57,7 +66,6 @@ export const authClient = createAuthClient({
 });
 ```
 
-
 You may want to clear the token based on the response status code or other conditions:
 
 ### 2. Configure the Auth Client
@@ -137,3 +145,10 @@ export async function handler(req, res) {
 ## Options
 
 **requireSignature** (boolean): Require the token to be signed. Default: `false`.
+
+**cookieName** (string): Custom cookie name for the temporary bearer token confirmation cookie. Default: `"bearer-token-confirmation"`.
+(For more information, [read here](https://github.com/better-auth/better-auth/pull/4330))
+
+<Callout type="warn">
+  If this value is changed, make sure to update the client plugin's `cookieName` option.
+</Callout>