I am new to APIs. I started working on AdWords API recently and my task is to find trending words on google or finding traffic estimate for specific words. I did OAuth 2.0 and entered Client Id, ClientSecret and refresh token in ads.properties file. But when i run EstimateKeywordTraffic.java i get the following Exception-
Exception in thread "main" AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server faultSubcode: faultString: [AuthenticationError.NOT_ADS_USER @ ; trigger:'<null>'] faultActor: faultNode: faultDetail: {https://adwords.google.com/api/adwords/cm/v201409}ApiExceptionFault:<message>[AuthenticationError.NOT_ADS_USER @ ; trigger:'<null>']</message><ApplicationException.Type>ApiException</ApplicationException.Type><errors xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="AuthenticationError"><fieldPath/><trigger><null></trigger><errorString>AuthenticationError.NOT_ADS_USER</errorString><ApiError.Type>AuthenticationError</ApiError.Type><reason>NOT_ADS_USER</reason></errors> [AuthenticationError.NOT_ADS_USER @ ; trigger:'<null>'] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at org.apache.axis.encoding.ser.BeanDeserializer.<init>(BeanDeserializer.java:104) at org.apache.axis.encoding.ser.BeanDeserializer.<init>(BeanDeserializer.java:90) at com.google.api.ads.adwords.axis.v201409.cm.ApiException.getDeserializer(ApiException.java:143) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.axis.encoding.ser.BaseDeserializerFactory.getSpecialized(BaseDeserializerFactory.java:154) at org.apache.axis.encoding.ser.BaseDeserializerFactory.getDeserializerAs(BaseDeserializerFactory.java:84) at org.apache.axis.encoding.DeserializationContext.getDeserializer(DeserializationContext.java:464) at org.apache.axis.encoding.DeserializationContext.getDeserializerForType(DeserializationContext.java:547) at org.apache.axis.message.SOAPFaultDetailsBuilder.onStartChild(SOAPFaultDetailsBuilder.java:157) at org.apache.axis.encoding.DeserializationContext.startElement(DeserializationContext.java:1035) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source) at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227) at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696) at org.apache.axis.Message.getSOAPEnvelope(Message.java:435) at org.apache.axis.transport.http.HTTPSender.readFromSocket(HTTPSender.java:796) at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:144) at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32) at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118) at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83) at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165) at org.apache.axis.client.Call.invokeEngine(Call.java:2784) at org.apache.axis.client.Call.invoke(Call.java:2767) at org.apache.axis.client.Call.invoke(Call.java:2443) at org.apache.axis.client.Call.invoke(Call.java:2366) at org.apache.axis.client.Call.invoke(Call.java:1812) at com.google.api.ads.adwords.axis.v201409.cm.CampaignServiceSoapBindingStub.get(CampaignServiceSoapBindingStub.java:1350) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.api.ads.common.lib.soap.SoapClientHandler.invoke(SoapClientHandler.java:109) at com.google.api.ads.common.lib.soap.axis.AxisHandler.invokeSoapCall(AxisHandler.java:213) at com.google.api.ads.common.lib.soap.SoapServiceClient.callSoapClient(SoapServiceClient.java:64) at com.google.api.ads.common.lib.soap.SoapServiceClient.invoke(SoapServiceClient.java:93) at com.sun.proxy.$Proxy14.get(Unknown Source) at adwords.axis.v201409.basicoperations.GetCampaigns.runExample(GetCampaigns.java:82) at adwords.axis.v201409.basicoperations.GetCampaigns.main(GetCampaigns.java:59) Kindly help as its urgent. 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