Authentication using IdentityServer4


I am trying to use expo AppAuth module for authentication using IdentityServer4 Code Flow with Pkce. Cant seem figure out how to implement the redirect uri in my AppAuth configuration settings
const config = {
issuer: ‘http://localhost:3000’,
clientId: ‘client’,
scopes: [‘profile’, ‘openid’],
redirectUri: [ ???]

i am getting an “Invalid redirect uri” error when i redirect to identityserver"