{"Username": A, "Condition":92, "Severity":32}
{"Username": A, "Condition":89, "Severity":65}
{"Username": B, "Condition":92, "Severity":60}
{"Username": B, "Condition":21, "Severity":53}
{"Username": B, "Condition":33, "Severity":65}
{"Username": C, "Condition":94, "Severity":60}
{"Username": C, "Condition":10, "Severity":65}
Above is a sample of my output. How can I get the count of the Usernames A & B? How can I get the count of only Username C?
Any help would be appreciated.