package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"

	"github.com/howeyc/gopass"
	"gopkg.in/ini.v1"
)

type ADFSConfig struct {
	Username string `ini:"user"`
	Password string `ini:"pass"`
	Hostname string `ini:"host"`
}

func newADFSConfig() *ADFSConfig {

	configPath := fmt.Sprintf("%s/.config/auth-aws/config.ini", os.Getenv("HOME"))
	adfsConfig := new(ADFSConfig)

	cfg, err := ini.Load(configPath)
	if err == nil {
		err = cfg.Section("adfs").MapTo(adfsConfig)
		checkError(err)
	}

	reader := bufio.NewReader(os.Stdin)

	if val, ok := os.LookupEnv("ADFS_USER"); ok {
		adfsConfig.Username = val
	} else if adfsConfig.Username == "" {
		fmt.Printf("Username: ")
		user, err := reader.ReadString('\n')
		checkError(err)
		adfsConfig.Username = strings.Trim(user, "\n")
	}
	if val, ok := os.LookupEnv("ADFS_PASS"); ok {
		adfsConfig.Password = val
	} else if adfsConfig.Password == "" {
		fmt.Printf("Password: ")
		pass, err := gopass.GetPasswd()
		checkError(err)
		adfsConfig.Password = string(pass[:])
	}
	if val, ok := os.LookupEnv("ADFS_HOST"); ok {
		adfsConfig.Hostname = val
	} else if adfsConfig.Hostname == "" {
		fmt.Printf("Hostname: ")
		host, err := reader.ReadString('\n')
		checkError(err)
		adfsConfig.Hostname = strings.Trim(host, "\n")
	}

	return adfsConfig
}

package main

import (
	"fmt"
	"os"

	"gopkg.in/ini.v1"
)

type ADFSConfig struct {
	Username string `ini:"user"`
	Password string `ini:"pass"`
	Hostname string `ini:"host"`
}

func newADFSConfig() *ADFSConfig {

	configPath := fmt.Sprintf("%s/.config/auth-aws/config.ini", os.Getenv("HOME"))
	adfsConfig := new(ADFSConfig)

	cfg, err := ini.Load(configPath)
	if err == nil {
		err = cfg.Section("adfs").MapTo(adfsConfig)
		checkError(err)
	}

	if val, ok := os.LookupEnv("ADFS_USER"); ok {
		adfsConfig.Username = val
	}
	if val, ok := os.LookupEnv("ADFS_PASS"); ok {
		adfsConfig.Password = val
	}
	if val, ok := os.LookupEnv("ADFS_HOST"); ok {
		adfsConfig.Hostname = val
	}

	return adfsConfig
}

--- 
+++ 
@@ -1,9 +1,12 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"os"
+	"strings"
 
+	"github.com/howeyc/gopass"
 	"gopkg.in/ini.v1"
 )
 
@@ -24,14 +27,31 @@
 		checkError(err)
 	}
 
+	reader := bufio.NewReader(os.Stdin)
+
 	if val, ok := os.LookupEnv("ADFS_USER"); ok {
 		adfsConfig.Username = val
+	} else if adfsConfig.Username == "" {
+		fmt.Printf("Username: ")
+		user, err := reader.ReadString('\n')
+		checkError(err)
+		adfsConfig.Username = strings.Trim(user, "\n")
 	}
 	if val, ok := os.LookupEnv("ADFS_PASS"); ok {
 		adfsConfig.Password = val
+	} else if adfsConfig.Password == "" {
+		fmt.Printf("Password: ")
+		pass, err := gopass.GetPasswd()
+		checkError(err)
+		adfsConfig.Password = string(pass[:])
 	}
 	if val, ok := os.LookupEnv("ADFS_HOST"); ok {
 		adfsConfig.Hostname = val
+	} else if adfsConfig.Hostname == "" {
+		fmt.Printf("Hostname: ")
+		host, err := reader.ReadString('\n')
+		checkError(err)
+		adfsConfig.Hostname = strings.Trim(host, "\n")
 	}
 
 	return adfsConfig
Add failover to CLI if missing any values
