[BUG] V1: Fix OpenAPI validation errors

[pcfreak30]

Bug Description

I have been working to automate CI generation of hyperswitch's SDK client in java at https://github.com/LumeWeb/hyperswitch-java-client/ and found the v1 has an error with openapigenerator.

There is a lot of unused models, but more there is some errors that need patching.

Unable to find image 'openapitools/openapi-generator-cli:latest' locally
latest: Pulling from openapitools/openapi-generator-cli
521f275cc58b: Pulling fs layer
4ec0d48772e2: Pulling fs layer
c206fa8d0304: Pulling fs layer
f36698d7f25c: Pulling fs layer
4f82fb5fa4a4: Pulling fs layer
4559053a904d: Pulling fs layer
7291391b1e6a: Pulling fs layer
4f82fb5fa4a4: Waiting
4559053a904d: Waiting
7291391b1e6a: Waiting
f36698d7f25c: Waiting
4ec0d48772e2: Verifying Checksum
4ec0d48772e2: Download complete
f36698d7f25c: Verifying Checksum
f36698d7f25c: Download complete
c206fa8d0304: Verifying Checksum
c206fa8d0304: Download complete
521f275cc58b: Verifying Checksum
521f275cc58b: Download complete
4f82fb5fa4a4: Verifying Checksum
4f82fb5fa4a4: Download complete
7291391b1e6a: Verifying Checksum
7291391b1e6a: Download complete
4559053a904d: Verifying Checksum
4559053a904d: Download complete
521f275cc58b: Pull complete
4ec0d48772e2: Pull complete
c206fa8d0304: Pull complete
f36698d7f25c: Pull complete
4f82fb5fa4a4: Pull complete
4559053a904d: Pull complete
7291391b1e6a: Pull complete
Digest: sha256:a3471717ed06ac2af7308f473a7b61e6985882b31c6c5c05d2a41515db3eff8a
Status: Downloaded newer image for openapitools/openapi-generator-cli:latest
Validating spec (/local/new_spec.json)
Errors:
	- paths.'/payments/{payment_id}/post_session_tokens'. Declared path parameter payment_id
	  needs to be defined as a path parameter in path or operation level
	- attribute paths.'/customers/payment_methods'(get).operationId is repeated
	- paths.'/customers/{customer_id}/mandates'. Declared path parameter customer_id needs to be
	  defined as a path parameter in path or operation level
	- paths.'/accounts/{account_id}/connectors'. Declared path parameter account_id needs to be
	  defined as a path parameter in path or operation level
	- attribute components.schemas.ApplePaySessionResponse.default is not of type `object`
Warnings: 
	- Unused model: PaymentLinkInitiateRequest
	- Unused model: WeChatPay
	- Unused model: PaymentsRequest
	- Unused model: OutgoingWebhookContent
	- Unused model: PaymentsDynamicTaxCalculationResponse
	- Unused model: ExtendedCardInfoResponse
	- Unused model: NextActionType
	- Unused model: PaymentMethodCollectLinkRequest
	- Unused model: PaymentLinkConfig
	- Unused model: PayoutListConstraints
	- Unused model: AdditionalPayoutMethodData
	- Unused model: PaymentMethodCollectLinkResponse
	- Unused model: OrderDetails
	- Unused model: MerchantConnectorId
	- Unused model: RoutableChoiceKind
	- Unused model: ExtendedCardInfo
	- Unused model: MobilePaymentNextStepData
	- Unused model: PayoutRetrieveBody
	- Unused model: ToggleDynamicRoutingQuery
	- Unused model: PaymentsDynamicTaxCalculationRequest
	- Unused model: RewardData
	- Unused model: ListBlocklistQuery
	- Unused model: PaymentListConstraints
	- Unused model: DefaultPaymentMethod
	- Unused model: DisplayAmountOnSdk
	- Unused model: ToggleDynamicRoutingPath
	- Unused model: OutgoingWebhook
	- Unused model: PaymentsRetrieveRequest
	- Unused model: PayoutRetrieveRequest
	- Unused model: PayoutLinkInitiateRequest

[error] Spec has 5 errors.

Expected Behavior

It should validate without errors (or ideally warnings)

Actual Behavior

It has both errors and warnings

Steps To Reproduce

create openapi_spec.json and run docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli validate -i /local/openapi_spec.json

Context For The Bug

No response

Environment

github actions.

Have you spent some time checking if this bug has been raised before?

• I checked and didn't find a similar issue

Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to submit a PR?

Yes, I am willing to submit a PR!