am getting an signup 404

[job-kiptoo-dev]

XHRPOSThttp://localhost:3000/api/auth/sign-in/username[HTTP/1.1 404 Not Found 133ms]

POST	http://localhost:3000/api/auth/sign-in/username

SIGN_IN: undefinedXHRPOST
http://localhost:3000/api/auth/sign-in/username
[HTTP/1.1 404 Not Found 133ms]

POST
http://localhost:3000/api/auth/sign-in/username
Status
404
Not Found
VersionHTTP/1.1
Transferred5.82 kB (15.06 kB size)
Referrer Policystrict-origin-when-cross-origin
Request PriorityHighest
DNS ResolutionSystem

Cache-Control
no-store, must-revalidate
Connection
keep-alive
Content-Encoding
gzip
Content-Type
text/html; charset=utf-8
Date
Tue, 13 May 2025 20:51:32 GMT
Keep-Alive
timeout=5
Transfer-Encoding
chunked
Vary
Accept-Encoding
X-Powered-By
Next.js

Accept
/
Accept-Encoding
gzip, deflate, br, zstd
Accept-Language
en-US,en;q=0.5
Connection
keep-alive
Content-Length
48
content-type
application/json
Cookie
next_hmr_refresh_hash=8eb6813ad09e7713cf81f82c85bca0870f120ebb89f8a85f
Host
localhost:3000
Origin
http://localhost:3001/
Priority
u=0
Referer
http://localhost:3001/
Sec-Fetch-Dest
empty
Sec-Fetch-Mode
cors
Sec-Fetch-Site
same-site
Sec-GPC
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0
SIGN_IN: undefined

[cakfan]

Make sure you have added the username plugin in your auth.ts file.

Auth Server:

import { betterAuth } from "better-auth"
import { username } from "better-auth/plugins"
 
export const auth = betterAuth({
    plugins: [ 
        username() 
    ] 
})

Auth Client:

import { createAuthClient } from "better-auth/client"
import { usernameClient } from "better-auth/client/plugins"

export const authClient = createAuthClient({
  plugins: [
    usernameClient()
  ]
})