How do I disable normal user creation and only allow creating tenants? #9691

Sturla created one month ago

I want to do the following

Disable that what ever user can either login or register as a user. There needs to be a tenant created. Is this possible with appsettings.json?
So the login (and registration) page should only have input for Tenant name and password.
Since I have a custom page that point to the login page I need the url to this page (if its not just the Login.cshtml page customized)
Show me what pages I need to customize/create and what I need to configure.

I´m on Blazor Web App (server/client)

AI-Bot created one month ago

Support Team ABP Agent

To achieve your requirements in an ABP Blazor Web App (v9.2.2), you need to customize the authentication and registration flow to enforce tenant creation and restrict user registration. Here’s a step-by-step solution:

Disable Normal User Registration/Login
- ABP does not provide a direct appsettings.json option to disable user registration or enforce tenant-based login only. You must customize the login and registration pages and logic.
- Remove or hide the registration option from the UI.
- In your login logic, require a tenant to be selected or entered before allowing login.
Login/Registration Page Customization
- You need to customize the login page to only show Tenant Name and Password fields.
- For Blazor, override the default login page by creating your own Login.razor (or Login.cshtml for MVC) in the appropriate folder (e.g., Pages/Account/Login.razor).
- Remove the username/email field and replace it with a tenant name input and password.
Custom Login Page URL
- The default login page is usually at /Account/Login. If you override it, the URL remains the same unless you change the routing.
- If you have a custom page that redirects to login, ensure it points to /Account/Login.
Pages to Customize/Create and Configuration
- Pages to Customize:
  - Pages/Account/Login.razor (or Login.cshtml for MVC)
  - Optionally, Pages/Account/Register.razor to remove or block registration
- Services/Logic to Update:
  - Update the login logic to resolve the tenant by name and authenticate only if a valid tenant is provided.
  - Optionally, implement a custom tenant lookup service for the login page.
- Example:
  - See the referenced solution for customizing the tenant switch and login UI:
    https://abp.io/support/questions/9283
- Sample Customization (Razor Page):

@page "/Account/Login"
     @inject ITenantAppService TenantAppService
     @inject NavigationManager Navigation

     <EditForm Model="@loginModel" OnValidSubmit="LoginAsync">
         <InputText @bind-Value="loginModel.TenantName" placeholder="Tenant Name" />
         <InputText @bind-Value="loginModel.Password" type="password" placeholder="Password" />
         <button type="submit">Login</button>
     </EditForm>

     @code {
         private LoginModel loginModel = new();

         private async Task LoginAsync()
         {
             // Lookup tenant, validate password, perform login
         }

         public class LoginModel
         {
             public string TenantName { get; set; }
             public string Password { get; set; }
         }
     }

Block Registration:
- Remove or hide the registration link from the UI.
- Optionally, override the registration endpoint to return a 404 or redirect.
Tenant Creation:
- Provide a separate page or flow for tenant creation, if needed.

Summary Table:

| Requirement | Solution | |-------------|----------| | Disable user registration | Remove/hide registration UI, block endpoint | | Only tenant login | Customize login page, require tenant name/password | | Custom login page URL | /Account/Login (customize as needed) | | Pages to customize | Login.razor, Register.razor (or .cshtml) |

Sources:

Validated: https://abp.io/support/questions/9283

This approach is based on ABP best practices for UI and authentication customization.

This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.

Sturla created one month ago

What is missing in my question is the following:

I want the user input to become the tenant

So when a user registers with username/email/password the username becomes the tenant autmatically. When they then login with a username/password that username is connected to the registered tenant.

Context for wanting this to be multi tenant

I´m looking for data separation and security
There will never be any custom domain url

maliming created one month ago

Support Team Fullstack Developer

If you want to log in with a username or email without selecting a tenant, you need to ensure that the username and email is unique across all tenants and host.

Are you sure you want to do this?

You can add a new page or customize the Register page to create a tenant at the same time during registration, and that's no problem.

Create a new tenant based on user registration info.
Switch to this new tenant.
Create a new user under the current tenant.

The problem is how to identify the current tenant during login.

Thanks.

Sturla created one month ago

Are you sure you want to do this?

No not really 🤦‍♂️

I´m trying to figure out if multi-tenancy is the correct way for my SaaS or not.

What I do know is that I do not want the user to have to input all three

user name (or email)
password
and a tenant name

So maybe this isn´t a multi-tenant system at all... I´m really starting to lean towards that...

maliming created one month ago

Support Team Fullstack Developer

We need an input to identify the current tenant, such as the user's input or the domain name. This is necessary.

alper created one month ago

Support Team Director

Do you need multi-tenancy? https://abp.io/community/articles/do-you-really-need-multitenancy-hpwn44r3

Sturla created one month ago

After thinking this over I have decided to go with mulit-tenancy where the user never knows anything about its tenant name. So a unique e-mail accross the SaaS, an email can only be used once!

Context and resoning

The question in the Conclusion of Alper's article helped but also future security/GDPR and future moving of a tenant is a part of it.
Logged in users (email) will be unique so there will only be one email for one tenant! Its not possible to create many tenants with the same email!
Tenant name will be auto generated at registration! The user (a tenant) will never need to know about its tenant name (there will never be a subdomain or custom domain for a tenant) so the tenant name is irrelevant.

| Step | URL | What the user types | What happens internally | | --------------- | ------------------------------ | ------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Register | https://yoursite.is/register | E-mail + Password | • Host context creates a new tenant with an auto-generated name (GUID (or first part of the e-mail)). <br>• Creates the first user in that tenant and assigns the TenantAdmin role. | | Login | https://yoursite.is/login | E-mail + Password | A custom LoginModel locates the user across all tenants, switches CurrentTenant to the user’s TenantId, then performs normal sign-in. | | After login | /app | – | CurrentUserTenantResolveContributor keeps the tenant id in the auth cookie, so every request is already scoped correctly. |

Highlevel implementation

Hide ABP’s tenant switcher entirely (no tenant selector)
Self-registration service that creates the tenant name (probably a Guid instead of the first part of email)
Enforce global e-mail uniqueness once at sign-up

I think this is a good conclusion. What do you think?

p.s <br> in the table works when you Preview it but not when published so this is a bug!

maliming created one month ago

Support Team Fullstack Developer

This is possible, and will there be multiple users in your tenant?

Thanks.

Sturla created one month ago

No there will only ever be one user per tenant. I see no reason why there would ever be another one.

maliming created one month ago

Support Team Fullstack Developer

Why create a tenant for a user in this situation?

This doesn't really seem like a multi-tenant use case.

Sturla created one month ago

Hi Maliming and Alper,

Thanks for the clarification. I’ve decided to keep ABP multi‑tenancy enabled even though the first release will have only one user per account, for these reasons:

Future multi‑user access – Account owners may later invite staff or content reviewers; multi‑tenancy gives me roles and isolation out‑of‑the‑box.
Editions & feature flags – I need the SaaS module to bundle limits (e.g., blog/landing‑page quotas etc.) and toggle new features for pilot groups or VIP customers. If I´m correct then multi-tenancy is needed for this, correct?
One‑offs for enterprise clients – With per‑tenant feature overrides (and connection strings) I can deliver bespoke functionality or move heavy customers to their own DB without refactoring. This is maybe the most unlicly scenario of the all but still a posibilitiy.
Easier forward than backward – Starting multi‑tenant now avoids the high cost of retro‑fitting TenantId filters, migrations, and per‑tenant workflows later.
Clean data isolation & compliance – Built‑in tenant boundaries simplify GDPR requests and potential future on‑premise deployments. (thinking about all of this has opened up the quite possible scenario of on-premise deployment).

I’ll hide the tenant selector on the login/registration pages (using the SignIn‑Without‑Tenant pattern) so the UX remains “email + password” only.

I’ve weighed the pros and cons, and although this approach might be a bit more complex upfront, I believe it will better futureproof the system—enabling it to handle a wide range of scenarios and simplifying updates and changes when the time comes.

Appreciate your guidance—just wanted to confirm the rationale behind staying multi‑tenant.

maliming created one month ago

Support Team Fullstack Developer

Sure, if you get any problems, feel free to reach out anytime.

Sturla created one month ago

I´m almost done but I need your help with Register.cshtml page. I have overriden the Login page but the Register page is causing me issues.

Its missing the Strength tracker, Show / hide icon, and caps-lock warning.

What I did was to get the LeptonX theme ( abp get-source Volo.Abp.LeptonXTheme.Pro --old) but there is no Register.cshtml file in there so have been trying to get it to work with this Register.cshml and that results in what you see on the image.

Am I missing something from You do it wrong! Customizing ABP Login Page Correctly (even though this is the Register page it should follow similar path, correct?)

Hope you can help me over the finishline with this one..

maliming created one month ago

Support Team Fullstack Developer

The Register page in the Account Pro module.

You can download its source code.

Thanks.

Sturla created one month ago

Found it and got it by abp get-source Volo.Account.Pro --old

It would have been nice to have this documented somewhere.. no way to just know these things... but thanks anyways

maliming created one month ago

Support Team Fullstack Developer

: )

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