[REQ][typescript-angular] Type ConfigurationParameters.credentials properly

ConfigurationParameters.credentials index does not list possible security schemes

Can we improve type safety of ConfigurationParameters field credentials? Currently it is generated as:

credentials?: {[ key: string ]: string | (() => string | undefined)};

That does not have great DX, because security schemes are not suggested by IDE and the value is not checked for possible typos.

Improved type definition

My suggestion is to create a type that lists security schemes, like:

type SecuritySchemes = 'ExampleA' | 'ExampleB';

And use it for credentials like:

credentials?: Partial<Record<SecuritySchemes, string | (() => string | undefined)>>;

That way we achieve better type safety and DX.

No files or tests are named. Start by locating the typescript-angular generator or template that emits ConfigurationParameters.credentials, then inspect how security schemes are represented in generated output. Done means credentials uses a generated security-scheme key type while retaining the documented string-or-function values.