applySecurities fails as securityDef is returned as undefined.

securityDef is returning undefined because get function is not able to look through nested object. Although the spec included the security definition get functioned failed to look for securitySchemes key.
https://github.com/swagger-api/swagger-js/blob/e0003d0d29a561a36c01004a3b65bdae5bc56b84/src/execute/oas3/build-request.js#L94

This is probably because the webpack config doesn't enable the Deep property path support for methods like _.get, _.has, & _.set. feature set

I was using https://swaggerapis.rainmaker.espressif.com/ API which involves getting an AccessToken(apiKey) after sending a login request. All rest of the authorised API calls used this token for verification. Whenever I made a request, securityDef would be undefined and API call would not execute.

I highly suspect the fix is just to add the above feature set to the loadlash module.

Thanks.

Start at src/execute/oas3/build-request.js around line 94 and inspect how the security definition is retrieved, then review the webpack configuration and its lodash feature support. Reproduce the request against the described API and confirm that nested securitySchemes resolution produces a security definition and allows the authorized call to execute.