This is the error i got. Please someone tell me what's this error means
C:\Users\SVSN390\Documents>npm install web-bluetooth npm ERR! Windows_NT 6.3.9600 npm ERR! argv "C:\Program Files (x86)\nodejs\\node.exe" "C:\Program Files (x86)\nodejs\node_modules\npm\bin\npm-cli.js" "install" "web-bluetooth" npm ERR! node v0.12.2 npm ERR! npm v2.7.4 npm ERR! code SELF_SIGNED_CERT_IN_CHAIN
npm ERR! self signed certificate in certificate chain npm ERR! npm ERR! If you need help, you may report this error at: npm ERR! https://github.com/npm/npm/issues
npm ERR! Please include the following file with any support request: npm ERR! C:\Users\SVSN390\Documents\npm-debug.log