delete added, more details below (#3)

- readme updates
- delete command added
- commands now saved in a map vs fields
- login and run now ensure config has been run to prevent errors

Reviewed-on: #3
Co-authored-by: jake <jake.young.dev@gmail.com>
Co-committed-by: jake <jake.young.dev@gmail.com>

cmd/login.go

@@ -5,6 +5,7 @@ package cmd
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
 	"os"
 
@@ -15,9 +16,10 @@ import (
 
 // loginCmd represents the login command
 var loginCmd = &cobra.Command{
-	Use:     "login",
-	Example: "mctl login",
-	Short:   "Login to server and send commands",
+	Use:          "login",
+	Example:      "mctl login",
+	SilenceUsage: true,
+	Short:        "Login to server and send commands",
 	Long: `Login to server using saved config and enter command loop
 			sending commands to server and printing the response.`,
 	Run: func(cmd *cobra.Command, args []string) {
@@ -54,6 +56,13 @@ var loginCmd = &cobra.Command{
 
 		fmt.Printf("Disconnected from %s\n", server)
 	},
+	PreRunE: func(cmd *cobra.Command, args []string) error {
+		//ensure config command has been run
+		if viper.Get("server") == "" || viper.Get("password") == "" || viper.Get("port") == 0 {
+			return errors.New("the 'config' command must be run before you can interact with servers")
+		}
+		return nil
+	},
 }
 
 func init() {