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guanhua liguanhua li 

keep getting error : INVALID_LOGIN: Invalid username, password, security token; or user locked out

my customer is keep getting the invalid login error .

even after we reset password and security token for them , the error still keep coming . 

is there any reason for this ? your help is much appreciated . 

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INVALID_LOGIN:
Invalid username, password, security token; or user locked out.

The response status=500 of request which url=https://login.salesforce.com/services/Soap/u/42.0/ and method=POST. Retry after 4 seconds.
The response status=500 of request which url=https://test.salesforce.com/services/Soap/u/39.0/ and method=POST. Retry after 4 seconds.
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INVALID_LOGIN:Invalidusername, password, securitytoken; oruserlockedout.


Theresponsestatus=500forrequestwhichurl=https://test.salesforce.com/services/Soap/u/39.0/andmethod=POST.
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VinayVinay (Salesforce Developers) 
Hi,

This occurs when your Salesforce login credentials are incorrect.  Try to login from UI using same credentials.

Thanks,
Abhishek BansalAbhishek Bansal
Make sure you are using the the right URL to login:

For Sandboxes we use: test.salesforce.com
For Production we use: login.salesforce.com

Let me know if this helped.