refactor!: working WD-4 user discovery

internal/api_schema/errors.go

@@ -6,6 +6,7 @@ var (
 	ErrUnauthorized       = NewAPIError(401, "Unauthorized")
 	ErrForbidden          = NewAPIError(403, "Forbidden")
 	ErrNotFound           = NewAPIError(404, "Not found")
+	ErrUserNotFound       = ErrNotFound(map[string]any{"reason": "user not found"})
 	ErrConflict           = NewAPIError(409, "Conflict")
 	ErrUsernameTaken      = NewAPIError(409, "Username is taken")
 	ErrRateLimitExceeded  = NewAPIError(429, "Rate limit exceeded")

internal/api_schema/users.go

@@ -2,6 +2,7 @@ package api_schema
 
 import (
 	"github.com/google/uuid"
+	"github.com/lysand-org/versia-go/pkg/lysand"
 )
 
 type User struct {
@@ -9,9 +10,16 @@ type User struct {
 	Username string    `json:"username"`
 }
 
+type LysandUser lysand.User
+
 type FetchUserResponse = APIResponse[User]
 
 type CreateUserRequest struct {
-	Username string `json:"username" validate:"required,username_regex,min=3,max=32"`
+	Username string `json:"username" validate:"required,username_regex,min=1,max=32"`
 	Password string `json:"password" validate:"required,min=8,max=256"`
 }
+
+type SearchUserRequest struct {
+	Username string  `query:"username" validate:"required,username_regex,min=1,max=32"`
+	Domain   *string `query:"domain" validate:"domain_regex"`
+}