400 bad request

i don’t know why it’s throwing error like this

17:20:24.353 [main] DEBUG org.springframework.web.client.RestTemplate - HTTP POST https://developer.paytmmoney.com/accounts/v2/gettoken
17:20:24.404 [main] DEBUG org.springframework.web.client.RestTemplate - Accept=[application/json, application/*+json]
17:20:24.410 [main] DEBUG org.springframework.web.client.RestTemplate - Writing [{"api_key":"02ae6cf69e1b407da33aae39f3d45a80","request_token":"request_token","api_secret_key":"2a1a5badf9ea4adf85871f26f9554ed1"}] as "application/json"
17:20:24.884 [main] DEBUG org.springframework.web.client.RestTemplate - Response 400 BAD_REQUEST
17:20:24.890 [main] ERROR com.paytmmoney.equities.pmclient.service.impl.SessionManagerServiceImpl - Exception in SessionManagerServiceImpl->generateSession:
org.springframework.web.client.HttpClientErrorException$BadRequest: 400 Bad Request: "{"status":400,"error_code":"PM_MERCHANT_AUTH_400607","message":"Invalid Api Key or Api Secret Key or Request Token"}"
	at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:101)

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