MM-31063: Change constants to use CamelCase (#16608)

* MM-31063: Change constants to use CamelCase

* store package

* change allcaps to camel case (#16615)

* New tools.mod

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

services/mfa/mfa.go

@@ -18,7 +18,7 @@ import (
 
 const (
 	// This will result in 160 bits of entropy (base32 encoded), as recommended by rfc4226.
-	MFA_SECRET_SIZE = 20
+	MFASecretSize = 20
 )
 
 type Mfa struct {
@@ -58,7 +58,7 @@ func (m *Mfa) GenerateSecret(user *model.User) (string, []byte, *model.AppError)
 
 	issuer := getIssuerFromUrl(*m.ConfigService.Config().ServiceSettings.SiteURL)
 
-	secret := model.NewRandomBase32String(MFA_SECRET_SIZE)
+	secret := model.NewRandomBase32String(MFASecretSize)
 
 	authLink := fmt.Sprintf("otpauth://totp/%s:%s?secret=%s&issuer=%s", issuer, user.Email, secret, issuer)