type 'typeof globalThis' has no index signature

i get this error whenever i try to add a function to the global nodejs global namsepace in a TypeScript environment.

Element implicitly has an 'any' type because type 'typeof globalThis' has no index signature

declaring the global namespace

declare global {
  namespace NodeJS {
    interface Global {
      signin(): string[]
    }
  }
}

so if i try this

global.signin = () => {}

it returns a

Element implicitly has an 'any' type because type 'typeof globalThis' has no index signature

in my own case i didn't quite realize until later that the global namespace i declared was case sensitive.

instead of this. before my question was edited it was namespace NODEJS

declare global {
  namespace NODEJS {
    interface Global {
      signin(): string[]
    }
  }
}

it was supposed to be this

declare global {
  namespace NodeJS {
    interface Global {
      signin(): string[]
    }
  }
}

pay attention to NODEJS and NodeJS. After i made these changes, typescript was cool with it and it work the way i expected it to.