How to retrieve data from msw mock request body

I am trying to retrieve data from a mock api call using msw while using Typescript. How would I go about doing this? I keep receiving "Property 'email' does not exist on type 'DefaultBodyType'"

Handler

export const handlers: RestHandler[] = [
  rest.post(`/${API_VERSION}/authentication/login`, (req, res, ctx) => {
    const {email} = req.body;
    console.log();
    return res(
      ctx.status(200),
      ctx.json({
        token: "abdb23231232jdsaWEDwdxaCDA",
        expiresIn: 100000,
        isEnabled: true,
        isLocked: false,
      })
    );
  })
];

You need to give the handler itself some types, describing what the request body and response body should look like.

interface LoginRequestBody {
  email: string;
}

interface LoginResponseBody {
  token: string,
  expiresIn: number;
  isEnabled: boolean;
  isLocked: boolean,
}

export const handlers = [
  rest.post<LoginRequestBody, LoginResponseBody>(`/${API_VERSION}/authentication/login`, (req, res, ctx) => {
    const {email} = req.body;
    console.log();
    return res(
      ctx.status(200),
      ctx.json({
        token: "abdb23231232jdsaWEDwdxaCDA",
        expiresIn: 100000,
        isEnabled: true,
        isLocked: false,
      })
    );
  })
];

You also don't need RestHandler[] as it's inferred.

This article written by the MSW maintainer may help understand more about types as well.