add Adduser option to Command struct and implement wrapping function

src/command.rs

@@ -23,12 +23,38 @@ pub enum Command {
         #[structopt(long = "scope", short = "s")]
         scope: Option<String>,
     },
+
     #[structopt(name = "pack")]
     /// 🍱  create a tar of your npm package but don't publish! [NOT IMPLEMENTED]
     Pack { path: Option<String> },
+
     #[structopt(name = "publish")]
     /// 🎆  pack up your npm package and publish! [NOT IMPLEMENTED]
     Publish { path: Option<String> },
+
+    #[structopt(name = "adduser", alias = "login", alias = "add-user")]
+    /// 👤  Add a registry user account! [NOT IMPLEMENTED]
+    Adduser {
+        #[structopt(long = "registry", short = "r")]
+        /// Default: 'https://registry.npmjs.org/'.
+        /// The base URL of the npm package registry. If scope is also specified, this registry will only be used for packages with that scope. scope defaults to the scope of the project directory you're currently in, if any.
+        registry: Option<String>,
+
+        #[structopt(long = "scope", short = "s")]
+        /// Default: none.
+        /// If specified, the user and login credentials given will be associated with the specified scope.
+        scope: Option<String>,
+
+        #[structopt(long = "always-auth", short = "a")]
+        /// If specified, save configuration indicating that all requests to the given registry should include authorization information. Useful for private registries. Can be used with --registry and / or --scope
+        always_auth: bool,
+
+        #[structopt(long = "auth-type", short = "t")]
+        /// Default: 'legacy'. 
+        /// Type: 'legacy', 'sso', 'saml', 'oauth'.
+        /// What authentication strategy to use with adduser/login. Some npm registries (for example, npmE) might support alternative auth strategies besides classic username/password entry in legacy npm.
+        auth_type: Option<String>,
+    },
 }
 
 pub fn run_wasm_pack(command: Command) -> result::Result<(), Error> {
@@ -38,6 +64,12 @@ pub fn run_wasm_pack(command: Command) -> result::Result<(), Error> {
         Command::Init { path, scope } => init(path, scope),
         Command::Pack { path } => pack(path),
         Command::Publish { path } => publish(path),
+        Command::Adduser {
+            registry,
+            scope,
+            always_auth,
+            auth_type,
+        } => adduser(registry, scope, always_auth, auth_type),
     };
 
     match status {
@@ -114,6 +146,18 @@ fn publish(path: Option<String>) -> result::Result<(), Error> {
     Ok(())
 }
 
+fn adduser(
+    registry: Option<String>,
+    scope: Option<String>,
+    always_auth: bool,
+    auth_type: Option<String>,
+) -> result::Result<(), Error> {
+    npm::npm_adduser(registry, scope, always_auth, auth_type)?;
+
+    PBAR.one_off_message("👋  added registry user account!");
+    Ok(())
+}
+
 fn set_crate_path(path: Option<String>) -> String {
     let crate_path = match path {
         Some(p) => p,