feat: add ability to send login code via email (#457)

Co-authored-by: Kyle Mendell <kmendell@ofkm.us>

backend/internal/dto/user_dto.go

@@ -32,11 +32,15 @@ type OneTimeAccessTokenCreateDto struct {
 	ExpiresAt time.Time `json:"expiresAt" binding:"required"`
 }
 
-type OneTimeAccessEmailDto struct {
+type OneTimeAccessEmailAsUnauthenticatedUserDto struct {
 	Email        string `json:"email" binding:"required,email"`
 	RedirectPath string `json:"redirectPath"`
 }
 
+type OneTimeAccessEmailAsAdminDto struct {
+	ExpiresAt time.Time `json:"expiresAt" binding:"required"`
+}
+
 type UserUpdateUserGroupDto struct {
 	UserGroupIds []string `json:"userGroupIds" binding:"required"`
 }