feat: oidc client create command (#672)

* feat: add oidc client create command

* refactor: use own utility for creating random strings (more flexible
than stdlib)

* feat: validate client name to avoid config errors

* refactor: limit to only alphanumeric characters and hyphens

* refactor: remove the need of the logger in the create oidc client cmd

internal/utils/security_utils.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"crypto/rand"
 	"encoding/base64"
 	"errors"
 	"net"
@@ -105,3 +106,9 @@ func GenerateUUID(str string) string {
 	uuid := uuid.NewSHA1(uuid.NameSpaceURL, []byte(str))
 	return uuid.String()
 }
+
+func GenerateString(length int) string {
+	src := make([]byte, length)
+	rand.Read(src)
+	return base64.RawURLEncoding.EncodeToString(src)[:length]
+}