Vector Search with JavaScript: example is not working

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Title: Vector Search with JavaScript
I have cloned the git repo from GitHub - hummusonrails/vector-example-blog-platform: Fully featured Medium.com clone with vector search functionality.

Unfortunately, I can not start it (on main branch):

> npm install; npm run dev
...
/Users/markus/git/vector-example-blog-platform/models/User.js:57
userModel.methods.generateAccessToken = function() {
                                      ^

TypeError: Cannot set properties of undefined (setting 'generateAccessToken')
    at Object.<anonymous> (/Users/markus/git/vector-example-blog-platform/models/User.js:57:39)
    at Module._compile (node:internal/modules/cjs/loader:1469:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1548:10)
    at Module.load (node:internal/modules/cjs/loader:1288:32)
    at Module._load (node:internal/modules/cjs/loader:1104:12)
    at Module.require (node:internal/modules/cjs/loader:1311:19)
    at require (node:internal/modules/helpers:179:18)
    at Object.<anonymous> (/Users/markus/git/vector-example-blog-platform/config/dbConnect.js:2:28)
    at Module._compile (node:internal/modules/cjs/loader:1469:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1548:10)

Node.js v20.17.0
[nodemon] app crashed - waiting for file changes before starting...

Also: what version of Couchbase should I install? Is the community edition sufficient?

Thanks
Markus

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