Login to Okta when using Get if user passes --login (#105)

if the user passes the --login flag and uses get when their session has
expired, automatically log in, instead of asking them to log in

cli/get.go

@@ -17,6 +17,7 @@ var (
 	FlagTimeRemaining = "time-remaining"
 	FlagTimeToLive    = "ttl"
 	FlagBypassCache   = "bypass-cache"
+	FlagLogin         = "login"
 )
 
 var (
@@ -42,6 +43,7 @@ func init() {
 	getCmd.Flags().String(FlagTencentCLIPath, "~/.tencent/", "Path for directory used by the tencent-cli tool. Default is \"~/.tencent\".")
 	getCmd.Flags().String(FlagCloudType, "aws", "Choose a cloud vendor. Default is aws. Can choose aws or tencent")
 	getCmd.Flags().Bool(FlagBypassCache, false, "Do not check the cache for accounts and send the application ID as-is to Okta. This is useful if you have an ID you know is an Okta application ID and it is not stored in your local account cache.")
+	getCmd.Flags().Bool(FlagLogin, false, "Login to Okta before running the command")
 }
 
 func isMemberOfSlice(slice []string, val string) bool {
@@ -70,8 +72,22 @@ A role must be specified when using this command through the --role flag. You ma
 	RunE: func(cmd *cobra.Command, args []string) error {
 		config := ConfigFromCommand(cmd)
 		ctx := cmd.Context()
+		oidcDomain, _ := cmd.Flags().GetString(FlagOIDCDomain)
+		clientID, _ := cmd.Flags().GetString(FlagClientID)
 		if HasTokenExpired(config.Tokens) {
-			return ErrTokensExpiredOrAbsent
+			if ok, _ := cmd.Flags().GetBool(FlagLogin); ok {
+				token, err := Login(ctx, oidcDomain, clientID, LoginOutputModeBrowser{})
+				if err != nil {
+					return err
+				}
+				if err := config.SaveOAuthToken(token); err != nil {
+					return err
+				}
+
+			} else {
+				return ErrTokensExpiredOrAbsent
+			}
+			return nil
 		}
 
 		ttl, _ := cmd.Flags().GetUint(FlagTimeToLive)
@@ -80,8 +96,6 @@ A role must be specified when using this command through the --role flag. You ma
 		shellType, _ := cmd.Flags().GetString(FlagShellType)
 		roleName, _ := cmd.Flags().GetString(FlagRoleName)
 		cloudType, _ := cmd.Flags().GetString(FlagCloudType)
-		oidcDomain, _ := cmd.Flags().GetString(FlagOIDCDomain)
-		clientID, _ := cmd.Flags().GetString(FlagClientID)
 		awsCliPath, _ := cmd.Flags().GetString(FlagAWSCLIPath)
 		tencentCliPath, _ := cmd.Flags().GetString(FlagTencentCLIPath)