fix(login): properly save scope if defined

setCredentialsByURI was clobbering the saving of the scope:registry
config

adduser.js

@@ -0,0 +1,87 @@
+const log = require('npmlog')
+const replaceInfo = require('./utils/replace-info.js')
+const BaseCommand = require('./base-command.js')
+const authTypes = {
+  legacy: require('./auth/legacy.js'),
+  oauth: require('./auth/oauth.js'),
+  saml: require('./auth/saml.js'),
+  sso: require('./auth/sso.js'),
+}
+
+class AddUser extends BaseCommand {
+  static get description () {
+    return 'Add a registry user account'
+  }
+
+  static get name () {
+    return 'adduser'
+  }
+
+  static get params () {
+    return [
+      'registry',
+      'scope',
+    ]
+  }
+
+  exec (args, cb) {
+    this.adduser(args).then(() => cb()).catch(cb)
+  }
+
+  async adduser (args) {
+    const scope = this.npm.config.get('scope')
+    console.log(scope)
+    const registry = this.getRegistry(this.npm.flatOptions)
+    const auth = this.getAuthType(this.npm.flatOptions)
+    const creds = this.npm.config.getCredentialsByURI(registry)
+
+    log.disableProgress()
+
+    log.notice('', `Log in on ${replaceInfo(registry)}`)
+
+    const { message, newCreds } = await auth(this.npm, {
+      ...this.npm.flatOptions,
+      creds,
+      registry,
+      scope,
+    })
+
+    await this.updateConfig({
+      newCreds,
+      registry,
+      scope,
+    })
+
+    this.npm.output(message)
+  }
+
+  getRegistry ({ scope, registry }) {
+    if (scope) {
+      const scopedRegistry = this.npm.config.get(`${scope}:registry`)
+      const cliRegistry = this.npm.config.get('registry', 'cli')
+      if (scopedRegistry && !cliRegistry)
+        return scopedRegistry
+    }
+    return registry
+  }
+
+  getAuthType ({ authType }) {
+    const type = authTypes[authType]
+
+    if (!type)
+      throw new Error('no such auth module')
+
+    return type
+  }
+
+  async updateConfig ({ newCreds, registry, scope }) {
+    this.npm.config.delete('_token', 'user') // prevent legacy pollution
+
+    this.npm.config.setCredentialsByURI(registry, newCreds)
+
+    if (scope)
+      this.npm.config.set(scope + ':registry', registry, 'user')
+    await this.npm.config.save('user')
+  }
+}
+module.exports = AddUser

lib/adduser.js

@@ -75,11 +75,9 @@ class AddUser extends BaseCommand {
 
   async updateConfig ({ newCreds, registry, scope }) {
     this.npm.config.delete('_token', 'user') // prevent legacy pollution
-
+    this.npm.config.setCredentialsByURI(registry, newCreds)
     if (scope)
       this.npm.config.set(scope + ':registry', registry, 'user')
-
-    this.npm.config.setCredentialsByURI(registry, newCreds)
     await this.npm.config.save('user')
   }
 }