Error reported during NPM package publishing process - `npm ERR! Unexpected token ＜ in JSON at position 0 while parsing near '＜!DOCTYPE HTML P

1. Abnormal error reporting process: During the package sending process, the following error occurred when performing npm login

2. Reason for error reporting: npm's mirror source is abnormal and the agent has not been set.

3. Solve

npm config get proxy
npm config get https-proxy
npm config set registry https://registry.npmjs.org